MALE BREAST-CANCER - A RETROSPECTIVE STUDY WITH IMMUNOHISTOCHEMICAL ANALYSIS OF HORMONE-RECEPTOR EXPRESSION

Of twenty-two cases of breast carcinoma diagnosed in men in Singapore since 1969, 17 were classified as infiltrative ductal carcinoma, three as papillary and one as mucinous carcinoma. The remaining case could not be classified and further immunohistochemical workup suggested the possibility of metastasis from an occult prostatic primary, Fourteen cases that were staged revealed a majority of seven (50%) cases in Sta ge II, with three (21%) Stage I, one (8%) Stage III and three (21%) St age IV cases. Estrogen and progesterone receptor (ER and PR) expressio n was determined in 20 cases using immunohistochemical staining of arc hival paraffin embedded tissue blocks, which demonstrated ER and PR po sitivity in 65% of the cases respectively.