ANAPLASTIC LARGE-CELL LYMPHOMA WITH HISTIOCYTIC PHENOTYPES

A 38 year old man died suddenly of widespread lymphoid neoplasm after a short clinical course. Histologically the tumor was composed of pleo morphic large cells that often demonstrated phagocytic activity. Moreo ver, histochemical and immunohistochemical tests revealed that the tum or cells had the phenotypes of both anaplastic large cell lymphoma and histiocytic cells. Immunogenotyping failed to demonstrate any lymphoi d nature. This case might be categorized as anaplastic large cell lymp homa with histiocytic phenotypes.