Carcinoid tumour of male breast diagnosed by fine needle aspiration

Abstract
A primary carcinoid tumour of the breast in a 66‐year‐old man was diagnosed by fine‐needle aspiration cytology. The nature of the lesion was proved by histochemical and immunocytochemical studies. The importance of a conclusive diagnosis is discussed and the value of immunocytochemical analysis as an aid to cytomorphologic diagnosis is demonstrated.

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