Angioimmunoblastic T-cell lymphoma obscured by concomitant florid epithelioid cell granulomatous reaction--a case report.

Epithelioid cell granuloma occurs in association with many neoplasms including lymphoma. However they have rarely obscured the microscopic features of a lymphoma. We report on a case where a florid epithelioid cell granulomatous reaction caused difficulty in interpretation and delayed the final diagnosis of a case of peripheral T cell lymphoma of the angioimmunoblastic type. We draw attention to this unusual phenomenon because of its practical implications.