Tumour of female paraurethral duct. Immunohistochemical similarity with prostatic carcinoma.

A case of adenocarcinoma derived from a female paraurethral duct is described. Morphologically the tumour looked like a prostatic adenocarcinoma. Furthermore, the tumour cells stained positively with antibodies to prostatic specific antigen and prostatic specific acid phosphatase. The karyotype of the patient was 45,x/46,xx/47,xxx/46,xt(x;13)(p11;q22) demonstrating that the patient was not a hermaphrodite. The tumour therefore represented female homology of a prostatic adenocarcinoma.