CYTOLOGIC DIAGNOSIS OF KI-1 LYMPHOMA IN PLEURAL AND PERITONEAL EFFUSIONS - A CASE-REPORT

This is a report of a case of Ki-1-positive large-cell anaplastic lymp homa in an 87-year-old man diagnosed on pleural and peritoneal fluids by cytomorphologic and immunohistochemical examination. Papanicolaou-s tained smears revealed many single, large neoplastic cells containing one or two nuclei with occasional multinucleated cells having a wreath -like nuclear arrangement. The tumor cells expressed Ki-1 antigen and epithelial membrane antigen. This is the first known report of Ki-1 ly mphoma diagnosed initially on cytologic examination of pleural and per itoneal fluids. (C) 1997 Wiley-Liss, Inc.