Amusia may occur in the context of more widespread cognitive dysfunction arthritis hand exercises buy plaquenil with visa, such as aphasia and agnosia arthritis pain killers purchase plaquenil cheap online. It has been found in association with pure word deafness arthritis gifts buy plaquenil with a visa, presumably as part of a global auditory agnosia arthritis inflammation feet discount plaquenil online master card. Isolated amusia has been reported in the context of focal cerebral atrophy affecting the nondominant temporal lobe. However, functional studies have failed to show strong hemispheric specificity for music perception, but suggest a cross-hemispheric distributed neural substrate. An impairment of pitch processing with preserved awareness of musical rhythm changes has been described in amusics. Congenital amusia: a group study of adults affiicted with a music-specific disorder. Receptive amusia: evidence for cross-hemispheric neural networks underlying music processing strategies. Cross References Agnosia; Auditory agnosia; Pure word deafness 26 Analgesia A Amyotrophy Amyotrophy is a term used to describe thinning or wasting (atrophy) of musculature with attendant weakness. Hence, although the term implies neurogenic (as opposed to myogenic) muscle wasting, its use is non-specific with respect to neuroanatomical substrate. Cross References Atrophy; Fasciculation; Neuropathy; Plexopathy; Radiculopathy; Wasting Anaesthesia Anaesthesia (anesthesia) is a complete loss of sensation; hypoaesthesia (hypaesthesia, hypesthesia) is a diminution of sensation. Anaesthesia may involve all sensory modalities (global anaesthesia, as in general surgical anaesthesia) or be selective. Anaesthesia is most often encountered after resection or lysis of a peripheral nerve segment, whereas paraesthesia or dysaesthesia (positive sensory phenomena) refiects damage to a nerve which is still in contact with the cell body. Anaesthesia dolorosa, or painful anaesthesia, is a persistent unpleasant pain. This deafferentation pain may respond to various medications, including tricyclic antidepressants, carbamazepine, gabapentin, pregabalin, and selective serotonin-reuptake inhibitors. Cross References Analgesia; Dysaesthesia; Neuropathy; Paraesthesia Analgesia Analgesia or hypoalgesia refers to a complete loss or diminution, respectively, of pain sensation, or the absence of a pain response to a normally painful stimulus. These negative sensory phenomena may occur as one component of total sensory loss (anaesthesia) or in isolation. Consequences of analgesia include 27 A Anal Refiex the development of neuropathic ulcers, burns, Charcot joints, even painless mutilation, or amputation. Congenital syndromes of insensitivity to pain were once regarded as a central pain asymbolia. Cross References Anaesthesia; Frontal lobe syndromes Anal Refiex Contraction of the external sphincter ani muscle in response to a scratch stimulus in the perianal region, testing the integrity of the S4/S5 roots, forms the anal or wink refiex. This refiex may be absent in some normal elderly individuals, and absence does not necessarily correlate with urinary incontinence. External anal responses to coughing and sniffing are part of a highly consistent and easily elicited polysynaptic refiex, whose characteristics resemble those of the conventional scratch-induced anal refiex. The anal refiex elicited by cough and sniff: validation of a neglected clinical sign. This is most commonly seen as a feature of the bulbar palsy of motor neurone disease. A motor disorder of speech production with preserved comprehension of spoken and written language has been termed pure anarthria; this syndrome has also been labelled as aphemia, phonetic disintegration, apraxic dysarthria, cortical dysarthria, verbal apraxia, subcortical motor aphasia, pure motor aphasia, and small or mini-Broca’s aphasia. It refiects damage in the left frontal 28 Anismus A operculum, but with sparing of Broca’s area. A pure progressive anarthria or slowly progressive anarthria may result from focal degeneration affecting the frontal operculum bilaterally (so-called Foix–Chavany–Marie syndrome). Slowly progressive anarthria with late anterior opercular syndrome: a variant form of frontal cortical atrophy syndromes. The “pure” form of the phonetic disintegration syndrome (pure anarthria): anatomo-clinical report of a single case. Cross References Aphemia; Bulbar palsy; Dysarthria Angioscotoma Angioscotomata are shadow images of the superficial retinal vessels on the underlying retina, a physiological scotoma. Cross Reference Scotoma Angor Animi Angor animi is the sense of dying or the feeling of impending death. It may be experienced on awakening from sleep or as a somesthetic aura of migraine. Cross Reference Aura Anhidrosis Anhidrosis, or hypohidrosis, is a loss or lack of sweating. This may be due to primary autonomic failure or due to pathology within the posterior hypothalamus (‘sympathetic area’). Anhidrosis may occur in various neurological disorders, including multiple system atrophy, Parkinson’s disease, multiple sclerosis, caudal to a spinal cord lesion, and in some hereditary sensory and autonomic neuropathies. Localized or generalized anhidrosis may be seen in Holmes–Adie syndrome, and unilateral anhidrosis may be seen in Horner’s syndrome if the symptomatic lesion is distal to the superior cervical ganglion. Cross References Holmes–Adie pupil, Holmes–Adie syndrome; Horner’s syndrome; Hyperhidrosis Anismus Anismus, also known as puborectalis syndrome, is paradoxical contraction of the external anal sphincter during attempted defaecation, leading to faecal retention and a complaint of constipation. This may occur as an idiopathic condition in isolation or as a feature of the off periods of idiopathic Parkinson’s disease. It 29 A Anisocoria is thought to represent a focal dystonia and may be helped temporarily by local injections of botulinum toxin. Cross References Dystonia; Parkinsonism Anisocoria Anisocoria is an inequality of pupil size. This may be physiological (said to occur in up to 15% of the population), in which case the inequality is usually mild and does not vary with degree of ambient illumination; or pathological, with many possible causes. Affected pupil is constricted (miosis; oculosympathetic paresis), as in: Horner’s syndrome; Argyll Robertson pupil; Cluster headache. Anisocoria greater in bright light/less in dim light suggests a defect in parasympathetic innervation to the pupil. Clinical characteristics and pharmacological testing may help to establish the underlying diagnosis in anisocoria. Cross References Argyll Robertson pupil; Holmes–Adie pupil, Holmes–Adie syndrome; Horner’s syndrome; Miosis; Mydriasis Annular Scotoma An annular or ring scotoma suggests retinal disease, as in retinitis pigmentosa or cancer-associated retinopathy (paraneoplastic retinal degeneration). This may be detected as abrupt cut-offs in spontaneous speech with circumlocutions and/or paraphasic substitutions. Patients may be able to point to named objects despite being unable to name them, suggesting a problem in word retrieval but with preserved comprehension. Anomia occurs with pathologies affecting the left temporoparietal area, but since it occurs in all varieties of aphasia is of little precise localizing or diagnostic value. The term anomic aphasia is reserved for unusual cases in which a naming problem overshadows all other deficits. Anomia may often be seen as a residual deficit following recovery from other types of aphasia. Anomia may occur with any dominant hemisphere space-occupying lesion, and as a feature of semantic dementia, being more prominent in this condition than in Alzheimer’s disease. Cross References Aphasia; Circumlocution; Paraphasia Anosmia Anosmia is the inability to perceive smells due to damage to the olfactory pathways (olfactory neuroepithelium, olfactory nerves, rhinencephalon). Kallman’s syndrome, hypogonadotrophic hypogonadism, a disorder of neuronal migration) or, much more commonly, acquired. Rhinological disease (allergic rhinitis, coryza) is by far the most common cause; this may also account for the impaired sense of smell in smokers. Head trauma is the most common neurological cause, due to shearing off of the olfactory fibres as they pass through the cribriform plate. Recovery is possible in this situation due to the capacity for neuronal and axonal regeneration within the olfactory pathways. Olfactory dysfunction is also described in Alzheimer’s disease and Parkinson’s disease, possibly as an early phenomenon, due to pathological involvement of olfactory pathways. Cross References Age-related signs; Ageusia; Cacosmia; Dysgeusia; Mirror movements; Parosmia Anosodiaphoria Babinski (1914) used the term anosodiaphoria to describe a disorder of body schema in which patients verbally acknowledge a clinical problem. La belle indifference describes a similar lack of concern for acknowledged disabilities which are psychogenic. Contribution a l’etude des troubles mentaux dans l’hemiplegie organique cerebrale (anosognosie).
Dictionary of Psychology & Allied Sciences 27 Anwesenheit: (German word arthritis in neck therapy discount plaquenil 200mg, means ‘presence’) is the experience in which the subject in clear consciousness arthritis treatment vellore buy 200mg plaquenil with amex, suddenly becomes aware of the presence of another person in the immediate vicinity arthritis in elbow order plaquenil pills in toronto, although the subject may in reality be alone or in the company of others arthritis in knee of horse purchase 200 mg plaquenil otc. The identity is often unknown but is sometimes felt to be a relative or close friend. It may be found in bereavement, temporal lobe epilepsy, sleep disorders, psychosis and drug-induced states (such as ergot derivatives, lisuride and pergolide). It is also reported by mountain climbers, polar explorers and ship wrecked sailors during periods of prolonged stress and physical danger, develop the feeling that an extreme member is with them. Apathy: Want of feeling or affect or interest or emotional involvement in one’s surroundings. Aphagia: A lack of eating which can be experimentally induced by lesions in the lateral hypothalamus. The disturbance cannot be explained on the basis of a defect in sensory pathways, in motor mechanism of phonation and articulation, or in sensorium. Specific types include (1) Motor (Broca’s) aphasia; difficulty in speaking, with comprehension preserved; (2) Sensory (Wernicke’s) aphasia; impaired comprehension, with speech relatively fluent (3) Conduction aphasia; preserved comprehension, with speech relatively fluent but with difficulty in correlating output with input, as in reading aloud or repeating spoken words (4) Anomic aphasia; difficulty in naming objects. Apophanous mood: A strange uncanny mood state in which the patient feels that there is something happening around him, but he does not know what it is. Apophanous perception: A new significance is attributed to a perception, usually is in the sense of selfreference in the absence of any emotional or rational cause. Apophany: A state in which one or more psychological phenomena acquire a new delusional significance, i. Apparent motion: A term used to describe visual illusions which provide an appearance of movement even when no such movement is actually occurring. Examples of this are found in the phi phenomenon, the water fall effect, and stroboscopic stimuli. Appeasement: A ritualized gesture (including vocalizations and scents of submission). It is commonly the opposite of threat gestures such as crouching which reduces apparent size and hides markings of sex and species. Apperception: Awareness of the meaning and significance of a particular sensory stimulus as modified by one’s own experiences, knowledge, thoughts and emotions. Appetitive behaviour: Behaviour which is directed towards the satisfaction of some kind of desire, want, or need. Applied psychology: A general term used to classify areas of psychology in which general theories are put in use to deal with practical, non-laboratory situations. Applied psychology traditionally includes clinical psychology, educational psychoDictionary of Psychology & Allied Sciences 29 logy, industrial and occupational psychology but also includes other fields where psychological theories may be put to use such as environment psychology or study skills. Apprehension: (1) In colloquial terms, a feeling of unease or dread concerning some future event (2) In cognitive terms the mental grasping or full comprehension of a concept or idea. Approach-avoidance conflict: A pattern of behaviour often seen when an organism is inclined or required to approach something which has simultaneously attractive and aversive qualities. The individual tends to oscillate between approach behaviour and avoidance behaviour, with approach behaviour typically dominant when the event or stimulus is more distant in time of space, and avoidance becoming more characteristic when the event or stimulus is closer. Aptitude: the ease with which a person will acquire a new set of skills or abilities. An individual is said to have an aptitude for a particular skill if she learns that skill more rapidly and with more ease than other individuals with the same prior knowledge of it. Aptitude test: A test to assess the ease with which a person will acquire specified skills, i. Archetypes: Classic, powerful images which, according to Carl Jung, are held in the collective unconscious and recur frequently in folk art and mythology. Examples of Jungian archetyes are: the earth mother, the sea as a symbol of rebirth, the omnipotent father, the inaccessible virgin, the knave, etc. Arithmetical retardation: Specific disorder in which the main feature is serious impairment in the 30 Dictionary of Psychology & Allied Sciences development of arithmetic skills which is not explicable in terms of general mental retardation or inadequate schooling synonyms: dyscalculia, developmental arithmetic disorder. Arousal: A state which the sympathetic division of the autonomic nervous system is activated producing an alarm reaction, or a longer-term response to stress. Arousal is characterized by very high levels of adrenaline in the blood stream, and results in a general state of readiness to react in the organism. Depending on cognitive and environmental factors, this may result in anger, anxiety, exhilaration excitement, or if the arousal is frequent and prolonged and the energy is not dissipated by regular demanding exercise, in long term stress disorders. Art therapy: Treatment procedure that uses the spontaneous creative work of the patient. For example, group members make and analyze drawings, which are often expressions of their underlying emotional problems. Articulation: (1) Clear verbal expressions (2) Free movement through the action of a joint, sometimes extended to mean the assembly of joints and levers that make such movements possible. Work on artificial intelligence has tended to concentrate on: (a) knowledge-based systems, known as ‘expert systems’, which are capable of limited decision making on the basis of input from a number of human experts; (b) manmachine interface research, such as the development of voice recognition systems; and (c) robotics, the development of sensing and manipulation processes. Dictionary of Psychology & Allied Sciences 31 Ascetic syndrome: A syndrome, which appears in adolescents and young adults, leading to psychosocial withdrawal, severe sexual abstinence, practice of religious austerities, lack of concern with personal appearance and considerable loss of weight (J. Asch effect: A term used to describe conformity arising through awareness that, if the individual stated their own judgement, they would be responding differently from the rest of the group, and that others would be aware of that dissent. Asch’s studies of conformity involves a subject members had been primed to give obviously wrong answers to a relatively simple problem and the real subject had to answer openly, after the majority had answered. Asch, Solomon Eliot: Born in 1907, in Warsaw, His work has been seminal in the study of both conformity and impression formation. In both areas he has been concerned with how people make sense of information they receive. Apart from halo effects (a tendency for individual’s judgements to be all in a favourable or all in an unfavourable direction), they also found the people were influenced by reports of the opinions of a large number of people, or the country’s leading psychologists. Asneezia: It signifies absence of sneezing or inability to sneeze, was described as a hitherto unrecognized psychiatric symptom (Shukla, G. The common psychiatric causes may be schizophrenia, endogenous depression, neurotic depression, hypochondriasis etc. Asociality: An indifference to social values or customs, withdrawal from society, as seen in a recluse or a regressed schizophrenic. Aspiration level: In a brilliant series of studies inspired by Lewin, Dembo and Hoppe conducted some of 32 Dictionary of Psychology & Allied Sciences the first experimental studies in human motivation. This believes that the experience of success and failure depends upon the person’s aspirations than on some objective standard of performance. Assertivenes training: A procedure in which subjects are taught appropriate interpersonal responses involving frank, honest, and direct expression of feelings, both positive and negative. Assimilation: One of two processes by which a schema in Piagetian theory is considered to develop. New information is said to have been assimilated when it fitted into existing schema and so can be understood in relation to earlier learning. Assimilation and accommodation are considered to be continuous cognitive processes, contributing to the generalized process of adaptation. Associative learning which has been acquired as a result of the connection of a stimulus with a response. Assortive mating: the tendency for organisms (including humans) to select as sexual partners those with characteristic similar to their own. Assumption: An idea or set of ideas which is taken for granted in the formulation of an argument or theory. Astasia-abasia: Incoordination in the erect position, and a resulting inability to stand or walk, with intact capacity for leg movements while sitting or lying down. In the absence of an organic lesion to the central nervous system, astesia-abasia is usually a manifestation of hysteria. Astasia, however can be a sign of organic cerebral pathology, especially involving the frontal lobes or corpus callosum. Asthenic personality: A disorder characterized by lack of enthusiasm, fatigability, lack of capacity for enjoyment, and low tolerance for stress. Dictionary of Psychology & Allied Sciences 33 Asyndesis: A disorder of language commonly seen in schizophrenia in which the patient combines unconnected ideas and images. Ataque or Puerto Rican syndrome: Often characterized by anxiety, hyperventilation, and pseudoepileptic movements. There may also be hallucinations, screaming, some violence to others or the self, and mutism. At other times, it is severe and extends to a few days, thereby causing difficulty in differentiating from acute schizophrenic episode or atypical psychosis.
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In general arthritis in neck therapy buy genuine plaquenil, immunotherapy slows disease progression but none has halted nor cured the disease arthritis in back and running cheap plaquenil 200 mg. Intravenous methylprednisolone and oral prednisone given for up to arthritis in fingers mayo clinic buy 200mg plaquenil visa 24 months in a tapering schedule may help to what helps arthritis in your back purchase 200mg plaquenil fast delivery diminish the intractable focal seizures and motor deficits during the first year of onset and before hemiplegia develops. Some authors recommend intravenous methylpred2 nisolone (400 mg/m every other day for 3 infusions followed by monthly infusions for the first year) and prednisone (2 mg/kg/ day tapered over 1–2 years) if further treatment is needed. Intraventricular interferon-a given via Omaya reservoir, intravenous rituximab, and tacrolimus have been investigated for control of epileptic and neurological aspects of Rasmussen’s syndrome. Ganciclovir has been also used and showed some therapeutic effect in patients treated early after appearance of symptoms (1–3 months). Serum GluR3 immunoreactivity spontaneously rose over the subsequent 4 weeks and she deteriorated clinically but had transient responses to a repeat course of therapy. More recent reports indicate that Serum GluR3 immunoreactivity, which was found in only few patients with Rasmussen encephalitis, is a feature of epilepsy syndromes and not specific to Rasmussen encephalitis. However, other brain autoantibodies have also been identified in Rasmussen’s encephalitis patients. Despite the paucity of clinical reports, a concerted trial of immunotherapy, including apheresis, to control seizures, mitigate functional decline, and delay the need for hemispherectomy in patients with Rasmussen encephalitis could be considered. A similar approach may be taken in subsequent courses if a salutary clinical effect is apparent. Focal seizures due to chronic localized encephB-lymphocytes in Rasmussen encephalitis. Cerebrospinal fluid protein is elevated and evidence of demyelination is present on electrophysiological testing. Patients with monoclonal gammopathies can present with similar findings (see Paraproteinemic polyneuropathies fact sheet). Similar clinical presentations may be seen with inherited, paraneoplastic and toxic neuropathies, and neuropathies associated with nutritional deficiency, porphyria, or critical illness. Therapies should be initiated early to stop the inflammatory demyelination and prevent secondary axonal degeneration, and therefore permanent disability. Therapeutic response is measured by improvement or stabilization of neurological symptoms, at which point treatment can be tapered or discontinued. Maintenance therapy is dictated by the patient’s symptoms and clinical examination. Secondary therapies include rituximab, cyclosporine, interferon, azathioprine, cyclophosphamide, methotrexate, and other immunosuppressive therapies which can be used in conjunction with immunomodulating treatments. A chronic inflammatory demyelinating polyneuropathy and plasma double-blind, sham-controlled, cross-over study. Brain 1996; exchange and plasmapheresis for articles published in the English 119:1055–1066. Kaya E, Keklik M, Sencan M, Yilmaz M, Keskin A, Kiki I, additional cases and trials. Beppu M, Sawai S, Misawa S, Sogawa K, Mori M, Ishige T, patients with neurological diseases: multicenter retrospective Satoh M, Nomura F, Kuwabara S. Plasma exchange in chronic inflammatory demyelinatpolyneuropathy: a five year follow up of 38 cases. This serious complications occurs in 20–30% of hemophilia A and 3–5% of hemophilia B patients. Monoclonal proteins may also bind to coagulation factors leading to acquired deficiency or functional defects (laboratory assays of coagulation function may not accurately reflect the hemostatic derangement and bleeding risk). Bleeding tendency with factor inhibitors is due to clearance of the specific factor and/or direct inhibition of the factor function. Current management/treatment Therapy for patients with coagulation inhibitors is based on diagnosis, presence of bleeding, and inhibitor titer. Polyclonal sheep antibodies bind all classes of Ig causing a large decrease in IgG levels. Technical notes To remove inhibitors, plasma flow rates are 35–40 mL/min in Immunosorba; a three plasma-volume treatment (10 L) requires 20–30 adsorption cycles. Transfusion References of the identified articles were searched for additional 2002;42:18–26. Plasmapheresis in immune hematology: review plasma exchange is ineffective in correcting amyloid associated of clinical outcome data with respect to evidence-based medifactor X deficiency. Hemostatic complications associated with the acute und long-term outcome of patients with lifeparaproteinemias. Sugiyama H, Uesugi H, Suzuki S, Tanaka K, Souri M, Ichinose tein A immunoadsorption. Ambaglio C, Lodo F, Trinchero A, Ghidelli N, Perotti C, Del high-risk haemorrhagic surgery. Jansen M, Schmaldienst S, Banyai S, Quehenberger P, Pabinger life-threatening lower limb haemorrhage. Hanafusa N, Hamasaki Y, Kawarasaki H, Kido R, Shibagaki Y, Br J Haematol 2001;112:91–97. Patients can also have systemic symptoms involving organ systems, including respiratory, cardiovascular (tachycardia, orthostatic intolerance), gastrointestinal (dysmotility), genitourinary (urinary retention), weakness, fatigue, and others. Many therapeutic agents have been used with variable and often partial effects including bisphosphonates, gabapentin, calcitonin, intravenous ketamine, free radical scavengers, oral corticosteroids, and spinal cord stimulation. Longstanding complex regional pain syndrome is assoComplex Regional Pain Syndrome and plasma exchange, plasmaciated with activating autoantibodies against alpha-1a adrenoceppheresis or apheresis for reports published in the English language. Goebel A, Shenker N, Padfield N, Shoukrey K, McCabe C, Serpell complex regional pain syndrome. Pain Physician 2015;18:383– M, Sanders M, Murphy C, Ejibe A, Milligan H, Kelly J, Ambler G. The aggregates of cryoglobulins can deposit on small vessels and cause damage by activating complement and recruiting leukocytes. This most commonly occurs on the skin of lower extremities because of exposure to lower temperatures. Cryoglobulinemia is associated with a wide variety of diseases including lymphoproliferative disorders, autoimmune disorders, and viral infections. When cryoglobulinemic vasculitis is present, the disease is referred to as CryoVas. The diagnosis of cryoglobulinemia is made by history, physical findings, low complement levels, and detection and characterization of cryoglobulins (including quantitation by the cryocrit). Current management/treatment Management is based on the severity of symptoms and treating the underlying disorder. More severe disease warrants the use of immunosuppressive therapy such as corticosteroids, cyclophosphamide, and rituximab. Survival at 12 months was statistically higher in the rituximab group compared with conventional therapy (64. A large case series (CryoVas survey) demonstrated greatest therapeutic efficacy of rituximab plus corticosteroids over corticosteroids alone or with alkylating agents in patients with noninfectious mixed CryoVas. It has been used mostly in active moderate to severe cryoglobulinemia with renal impairment (membranoproliferative glomerulonephritis), neuropathy, arthralgia, and/or ulcerating purpura. Double or cascade filtration, which separates plasma out of whole blood in the first filter and removes high molecular weight proteins in the second filter (such as IgM), has also been used to treat cryoglobulinemia. Another apheresis modality used in this disease is cryofiltration or cryoglobulinapheresis, which cools the plasma in an extracorporeal circuit either continuously or in a two step procedure to remove cryoglobulins, the remaining plasma is warmed to body temperature prior to returning to the patient. Technical notes It is prudent to warm the room, draw/return lines, and/or replacement fluid to prevent intravascular precipitation of the cryoglobulins. Referenofiltration apheresis for treatment of cryoglobulinemia associces of the identified articles were searched for additional cases and ated with hepatitis C. Leg ulcers associated with cryoglobuline2012;64:835–842 mia: clinical study of 15 patients and response to treatment. Stefanutti C, Vivensio A, DiGiamcomo S, Labbadia G, MazzaF, Arch Dermatol 2003;13:391–393. Terrier B, Krastinova E, Marie I, Launay D, Lacraz A, Cryoglobulinemia Vasculitis. Am J Med 2015 S0002BelenottiP, de Saint-Martin L, Quemeneur T, Huart A, Bonnet 9343(15)00252-1. De Vita S, Quartuccio L, Isola M, Mazzaro C, Scaini P, Lenzi infectious mixed cryoglobulinemia vasculitis: data from 242 M, Campanini M, Naclerio C, Tavoni A, PieterograndeM, Ferri cases included in the CryoVas survey.
These have been called “other cancers” in the radiotherapy utilisation tree and comprise 2% of the entire cancer population according to what causes arthritis in back plaquenil 200 mg line the Australian Institute of Health and Welfare report (1) arthritis pain back purchase 200 mg plaquenil with mastercard. These cancers include paediatric cancers rheumatoid arthritis yoga therapy buy plaquenil 200 mg otc, sarcomas of soft tissue and bone arthritis neck visual disturbance plaquenil 200 mg fast delivery, cancers of the mediastinum, orbit, peritoneum, retroperitoneum, penis, and pleura as well as other rare malignancies. Some of these malignancies are commonly treated with radiotherapy (such as soft tissue sarcomas) and others are rarely treated with radiation (eg. The method of estimating the impact of the requirement for radiotherapy of these other cancers on the overall estimate of radiotherapy utilisation was to estimate that the requirement for radiotherapy was 50% and then perform sensitivity analysis where the use of radiotherapy for other cancers ranges between 0 and 100%. Review of the chapter on sensitivity analysis will indicate the impact of this uncertainty on the final estimate. Results and Sensitivity Analyses In the radiotherapy utilisation tree, a total of 415 branches were constructed for all the cancers that represented 1% or greater of the entire registrablecancer population. The branches that ended with the recommendation for radiotherapy numbered 250 and a further 165 branches ended with no radiotherapy being recommended. In terms of peer review, drafts of each of the chapters were sent to the designated expert reviewers. This comprised 15 National Cancer Control Initiative steering committee members and 91 expert reviewers. Reviewers who were specialised in one or two particular tumour sites were sent only the relevant chapters. General radiation oncology, medical oncology, surgery, palliative care and nursing reviewers were sent all chapters to comment on. Some reviewers who felt that they were not sufficiently expert enough in a particular area often indicated that they had passed the responsibility on to an expert within their department or specialty. Forty-two of the reviewers provided comments, with 43% of reviewers being from a non-radiation oncology specialty. This resulted in 139 changes to the text, trees, epidemiological data or evidence cited including a number of offers of additional epidemiological data. The review also resulted in 2 major reconstructions of the radiotherapy utilisation trees for 2 tumour sites. The radiotherapy branches that represented the greatest proportion of cancer patients receiving radiation were early breast cancer treated by breast conserving surgery and post-operative radiotherapy (8% of all cancer diagnoses), preor post-operative radiotherapy for T3-4 or N2-3 rectal cancer (1%), early prostate cancer (2%) and metastatic prostate cancer (2%). In addition, there were many branches that ended in radiotherapy being recommended for symptom control for Non Small Cell Lung Cancer (3-6%). These data are based on the estimates most likely to be closest to the real value for each of the variables within the tree. As the table shows, the overall proportion of patients who would receive radiotherapy in an optimal situation based upon the evidence available is 52. The optimal radiotherapy utilisation rates in Table 1 vary from a low rate of 0% for liver cancer patients to a high of 92% of Central Nervous System tumour patients recommended to have radiotherapy during the course of their illness. Data Uncertainty As indicated in many of the chapters on specific tumour sites, there were variables for which there was significant uncertainty. Typically these were near the terminal ends of the trees where large studies on prevalence rates were lacking, 2. For example, the guidelines reviewed for breast cancer recommended radiotherapy for post-mastectomy patients with > 3 axillary nodes involved, but also “to consider” radiotherapy for patients with any nodal involvement. Uncertainty in the choice of radiotherapy between treatment options of approximately equal efficacy such as surgery, observation or radiotherapy for localised prostate cancer. The uncertain variables are listed under each of the three types of uncertainty along with the range of values applied in the sensitivity analyses. Uncertainty 2: Variations in the recommendation for radiotherapy based on treatment guideline uncertainty • Whether adjuvant radiotherapy recommended for T4 colon cancer = 0. The methodology, differences between the analyses and the results are described below. One-way sensitivity analysis allows an assessment or estimate to be made of the impact of varying the value of one of the branches of the tree on the overall radiotherapy utilisation estimate. This was done by setting upper and lower data limits and modelling the radiotherapy utilisation tree using these extreme values. One-way sensitivity analyses were described in each of the tumour-specific chapters and have been aggregated here as a tornado diagram. A tornado diagram is a set of one-way sensitivity analyses brought together in a single graph. Further details on the description and interpretations of tornado diagrams can be found in the section on materials and methods. The tornado diagrams for each of the individual tumour sites can be found in the relevant chapters. Each bar represents a single one-way sensitivity analysis and the legend provides details of each of the analyses depicted. The variables are ranked on their effect on the overall radiotherapy utilisation estimate with the variables that have most impact appearing at the top of the graph and those with smaller impact appearing below. The model is seen to be robust as the overall impact that any one of these uncertainties have on the radiotherapy utilisation rate is relatively minor. However, Monte Carlo simulations can be done in order to assess the impact that these data uncertainties have on the overall radiotherapy utilisation rate in a multivariate fashion. Monte Carlo simulations are based upon the random sampling of variables from discrete and continuous distributions using individual trial data. The main weakness of the Monte Carlo analysis in this study is that the relative importance of all of the data used are weighted by study size and may not necessarily be ranked by study quality. For the various different types of data uncertainties described above, assumptions were made on the distribution of data as described below. For data uncertainties where various different trial data sets were used (Type 1 data uncertainty above), the available trial data were used to calculate betadistributions using FastPro version 1. For most conventional Bayesian calculations of differing datasets, it is usually assumed that these data follow a beta distribution (1). For this Monte Carlo analysis, beta distributions were calculated for each of the uncertain data parameters. These distribution calculations were based upon the sample size and the proportion data quoted in the original paper. For variations in the radiotherapy treatment indication (Type 2 above), the guideline uncertainty could not be modelled for Monte Carlo analysis and therefore the preferred practice as recommended by the guidelines was used in the Monte Carlo analysis. For situations where there was uncertainty in the use of radiotherapy compared to equally efficacious treatment or where the reasonable use of radiotherapy would fluctuate between two extremes based upon subjective criteria (Type 3 above), an estimate based upon current practice was used for the optimal radiotherapy utilisation estimate. To obtain upper and lower bounds we made estimates on the absolute extremes, beyond which it was thought to be unreasonable for the true value to lie, according to expert opinion. For the Monte Carlo simulations these data were modelled assuming a triangular distribution of values which assumes that the estimate based upon current practice is the most likely value and as the values move further away from this value the less frequently they occur in the Monte Carlo simulations. For situations where a range could be estimated but no patterns of practice data existed to assist with an “optimal” figure, then a flat distribution was assumed whereby any value within the range would be equally likely to be used in the Monte Carlo simulations. The tightness of the confidence intervals demonstrates that the overall figure is robust. This final estimate is remarkably precise despite uncertainty existing in relation to data. These tight confidence intervals can be explained by the fact that good quality data existed for the initial branches of the tree (eg. Most of the uncertainty existed in the distal or near-terminal branches of the tree and hence affected very small proportions of the cancer population, thus having very little effect on the overall figure. In addition, the effect of these variations was such that some would increase the overall utilisation rate while others would reduce it, so that to a large extent they would cancel each other. Limitations of this study Some limitations of the study have been identified and are discussed below: (a) Quality of data this study has identified the areas where good quality epidemiological data (based on stage, performance status etc. In the meantime, we have overcome the problem by performing modelling and sensitivity analysis to indicate the relatively minor impact that any of these data uncertainties might have on the overall utilisation rate. However, this does not alter the recommendation that better epidemiological data be available in future. To include nonregistered cancers would inflate the numerator of the utilisation rate. Radiotherapy has been identified as an effective treatment for skin cancers and represents a large caseload in some departments. In addition, metastatic involvement of neck lymph nodes by skin cancers in the head and neck is an indication for radiotherapy. The proportion of patients with non-melanomatous skin cancer in the community who, in an ideal, evidence-based world should see a radiation oncologist for treatment is not known.