Fine-needle aspiration cytology of primary Kaposi's sarcoma of lymph nodes in an immunocompetent man.

This case report describes the fine-needle aspiration (FNA) findings of primary lymphadenopathic Kaposi's sarcoma (KS) in a 44-year-old African heterosexual male who is immunocompetent and has no clinical or serological evidence of the acquired immunodeficiency syndrome (AIDS) or the endemic form of KS. The cytological findings emphasize the role of FNA in the diagnosis of KS and draw the attention to the fact that a diagnosis of KS in an African man is not synonymous with the diagnosis of AIDS or endemic/African KS. A description of other spindle cell intranodal lesions which may mimick KS is given with a discussion of the differential diagnoses that should be considered in such cases by the cytopathologist.