Testicular seminoma with pagetoid spread into the vas deferens: A rare histopathological presentation

Testicular cancer, in particular testicular germ cell tumours, is the most common malignancy in young adult men. Defining prognosis and the best therapeutic strategy is challenging since accurate staging could be controversial. We report an unusual case of seminoma with pagetoid spread into the rete testis and, unexpectedly, also within the epithelium of the vas deferens, up to the margin of excision of the spermatic cord. Focussing on the extremely rare pathological finding and the challenge in defining the stage and the best post-surgical management, we would like to raise some issues about the knowledge gap on this topic.