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A low incidence of lung carcinoma has been reported in cases of prolonged use of aspirin. Cyclooxygenase (COX) 2 expression is frequently seen in adenocarcinoma of the lung, but COX-2 expression in atypical adenomatous hyperplasia (AAH), a possible precursor lesion of adenocarcinoma of the lung, is not known. COX-2 expression was immunohistochemically evaluated in a cohort of 20 cuboidal cell hyperplasias...
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