Tumors of the Collecting Duct and Rete Testis

Abstract

There are two primitive tumors of the rete testis: adenomas with a benign behavior and adenocarcinomas with a malignant outcome. According to their architectural pattern, adenomas can be solid (sertoliform cystadenoma), papillary (papillary cystadenoma), cystic (cystadenoma), or with a fibromatous stromal component (adenofibromas). In addition to the most common variety, adenocarcinomas of the rete testis include clear cell adenocarcinomas. Two cases have been chosen as representative of this group: a sertoliform cystadenoma and an adenocarcinoma; they both make it possible to comment on the differential diagnosis not only between them but also with other tumors, as it is the case of adenocarcinoma, both primary tumors of the testis and metastases.