Fibrocalcific Constrictive Pericarditis Due toHistoplasma capsulatum

Abstract
RECOGNITION of the etiology of many cases of chronic fibrous and constrictive pericarditis is often clinically and pathologically difficult. In 1902 Wells,1 reporting on this problem, discerned the cause in only 14 of 57 examples studied, the remainder being designated as idiopathic. Numerous reviews2 3 4 5 6 have subsequently been recorded, and yet in less than 50 per cent has the causal agent clearly been documented. It appears of interest that recourse to more recent bacteriologic and histologic technics as well as the opportunity to obtain tissue during life by open pericardial biopsy has failed to alter this diagnostic accuracy. Indeed, Proudfit and . . .

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