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are usually stabilized on antihypertensive therapy either in the hospital or when attending the outpatient clinic. However, the BP of hypertensive patients often shows a marked fall from outpatient levels during a period of hospitalization. 2 noted a 10% to 20% decline in both systolic and diastolic pressure in almost 85% of their 91 patients following admission to hospital. The max-

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Leukotriene synthesis may be increased in a variety of inflammatory diseases. Urinary leukotriene E4 is a stable metabolite of leukotrienes C4 and D4 which has previously been found to be increased in exacerbations of severe asthma and after antigen inhalation. Levels of urinary LTE4 in seven patients during and after a severe flare of atopic dermatitis were measured by high-performance liquid chromatography (HPLC) and radioimmunoassay (RIA). Mean urinary LTE4 levels (+/- SEM) were not increased during (16.7 +/- 3.7 pg/mumol) or after (16.9 +/- 4.8 mumol) the acute exacerbation of atopic dermatitis when compared with the normal range (mean = 23.8 [95% confidence interval 19.9-28.2] pg/mumol creatinine). These findings do not provide evidence of cysteine leukotriene involvement in the pathogenesis of atopic dermatitis.