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Metastatic non-seminomatous germ cell tumour and dermatomyositis.

Twenty to thirty percent of cases of dermatomyositis in adults are associated with malignancy. We report a case in which dermatomyositis heralded the development of a testicular germ cell tumour. Germ cell testicular tumours are treatable and our case emphasizes the importance of measuring blood levels of beta-human chorionic gonadotrophin and alpha-fetoprotein and examination of the testes in young males with indications of possible malignancy.