title: Metastatic teratoma from a regressed impalpable testicular primary.
abstract: A young man presented with a perineal tumour which despite intensive investigation, remained of unknown origin and required radical excision. It was subsequently shown to be a metastasis from a primary regressed testicular teratoma. It is important to exclude a testicular origin in these patients wherever possible because such tumours are often chemosensitive.
authors: Department of Surgery, Hammersmith Hospital and Royal Postgraduate Medical School, London, UK.
authors: P D
authors: PD
authors: Abel
authors: G
authors: G
authors: Williams
mesh_terms: D000328:Adult; D006801:Humans; D008297:Male; D009365:Neoplasm Regression, Spontaneous; D010502:Perineum / Q000473:pathology*; D013724:Teratoma / Q000473:pathology / Q000556:secondary*; D013736:Testicular Neoplasms / Q000473:pathology*