<prompt> The following is not seen in undescended testis:HydroceleHerniaTeratomaSeminoma  <response>: Ans. a HydroceleRef: Bailey 26th Edition, Page 1378 Around 90 of boys with an undescended testis have a patent processus vaginalis Hernia Malignancy associated with undescended testis are Seminoma and Teratoma Seminoma is the most common cancer associated. 