Histologic variants of seminoma mimicking lymphatic malignancies of the testis: a literature review with a report of case series focusing on problems in differential diagnosis.

We focused on the clinical and morphologic similarities that may cause a misdiagnosis between histologic variants of seminoma and we highlighted the differences between spermatocytic seminoma and high-mitotic rate seminoma or plasmocytic testicular lymphoma or plasmacytoma of the testis. We emphasized on the difficult points in the differential diagnosis, with a critical review of the literature, reporting a case series to discuss problems in differential diagnosis.