title: Massive seminoma presenting with inguinal lymph node metastases only.
abstract: 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.
authors.affiliation: North West Thames Foundation School, Imperial College Healthcare Trust,  London, UK benjamin.norton@imperial.nhs.uk benjamincnorton@gmail.com.
authors.forename: Benjamin C
authors.initials: BC
authors.lastname: Norton
authors.affiliation: Department of Urology, Imperial College Healthcare Trust, London, UK.
authors.forename: Ian
authors.initials: I
authors.lastname: Robertson
authors.affiliation: North West Thames Foundation School, Imperial College Healthcare Trust,  London, UK.
authors.forename: Hui
authors.initials: H
authors.lastname: Fan
authors.affiliation: Imperial General Practice Specialist Training, Imperial College Healthcare Trust,  London, UK.
authors.forename: Rula
authors.initials: R
authors.lastname: Najim
authors.affiliation: Department of Urology, Imperial College Healthcare Trust, London, UK.
authors.forename: Yaman
authors.initials: Y
authors.lastname: Altal
authors.affiliation: Department of histopathology, Imperial College Healthcare Trust, London, UK.
authors.forename: Ann
authors.initials: A
authors.lastname: Sandison
authors.affiliation: Department of Urology, Imperial College Healthcare Trust, London, UK.
authors.forename: David
authors.initials: D
authors.lastname: Hrouda