[Adenomatoid tumor and mesothelioma of the male genital tract]

Adenomatoid tumor of the male genital tract -- a pathological study of eight cases and review of the literature

Eight cases of adenomatoid tumors of the male genital tract are presented. Histological, histochemical, and electron microscopic studies were performed and an approach to a new classification of adenomatoid tumors was discussed. The number of so-called adenomatoid tumors of male genital tract reported in Japan adding our eight cases totalled 60 cases. These were classified as follows; 10 cases of mesothelial (superficial) type and 50 cases of adenomatoid (profound) type. Besides these, 8 cases of mesothelial type were reported in foreign literatures. Three cases of adenomatoid tumors of the uterus and a case of epididymitis chronica with reactive proliferation of mesothelial cells were also examined. As a result of these investigations, it is suggested that the histogenesis of the so-called adenomatoid tumors is composed of two different processes; i.e., mesothelial type arising from serosal mesothelial cells. and adenomatoid type arising from immature Müllerian mesenchymal tissue.