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Addison's disease presenting with cerebral edema.

BACKGROUND: Increased intracranial pressure with encephalopathy has rarely been reported in Addison's disease. METHOD: Case Study. RESULTS: A 16-year-old female who presented with cerebral edema of unknown etiology was eventually diagnosed as having Addison's disease. She had early morning headaches, fatiguability, diarrhea and deterioration in school performance. She was hyponatremic with a serum sodium of 128 mmol/L and hyperkalemic with a serum potassium of 5.9 mmol/L. She had a low serum osmolality (264 mosm), high urine osmolality (533 mosm) and high urine sodium (87 mosm). She had a postural drop in blood pressure and diffuse hyperpigmentation. An ACTH stimulation test revealed a low baseline cortisol and no response to ACTH. Plasma renin activity was increased. Serum ACTH was elevated. She responded well to intravenous fluids and solu-cortef and was discharged on hydrocortisone and florinef. She remains well 18 months after the acute episode with no neurologic complaints or findings. CONCLUSION: Addison's Disease should be considered in the differential diagnosis of symptomatic cerebral edema and idiopathic intracranial hypertension.

Addison Disease↗

Addison's disease.

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Addison Disease↗

Addison's other disease: primary biliary cirrhosis as a model autoimmune disease.

Thomas Addison described three of the classical autoimmune diseases, so can justifiably be regarded as one of the fathers of the study of autoimmunity. The least well recognised of these conditions, the autoimmune liver disease primary biliary cirrhosis (PBC), is in some ways the most interesting. As a result of the relatively advanced state of knowledge of its immunopathogenesis, it represents a good model for the study of autoimmune disease. The classical pathological lesion of PBC is apoptotic damage to the biliary epithelial cells lining the small intrahepatic bile ducts. The disease is typified by two symptom sets: fatigue and pruritus, which can occur at any stage of the disease process, and the features of advanced liver disease, which occur when secondary liver damage results from bile retention. Although autoantibodies directed at, in particular, pyruvate dehydrogenase complex (PDC) are almost universally present in PBC (and represent an important diagnostic tool), it appears likely that CD8+ cytotoxic T cells reactive with self-PDC derived epitopes are directly responsible for target cell damage. Recent studies in humans and a novel murine disease model have shed light on the mechanism of breakdown of immune tolerance to self-PDC; they provide important insights into the pathogenesis of PBC in particular and of autoimmunity in general.

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Addison's disease.

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Addison Disease↗