Massive seminoma presenting with inguinal lymph node metastases only

Seminomatous germ cell tumours characteristically affect men in their second-to-fourth decades, presenting as a testicular mass. Metastases when present are usually seen in para-aortic lymph nodes. These tumours are difficult to diagnose clinically and histologically when the presentation is unusual. We describe a seminoma presenting in a 61-year-old male as an inguinal mass with associated lymphadenopathy resembling lymphoma. Past medical history included ipsilateral cryptorchidism and orchidopexy. The tumour responded well to conventional chemotherapy. This case illustrates a possible diagnostic pitfall and that germ cell tumours should be included in the differential diagnosis of tumours presenting in the groin.