Successful cure of dermatomyositis after treatment of nonseminomatous testicular cancer.

Although the association between dermatomyositis and cancer is well recognized, there have been a limited number of reports of dermatomyositis associated with testicular cancer. We report the case of a 31-year-old man who was diagnosed with dermatomyositis. Because the patient's serum levels of alpha-fetoprotein and human chorionic gonadotropin beta subunit were elevated, the patient was referred to our department. Physical examination revealed an induration (2 cm x 2 cm) in the left testis and the patient was diagnosed with stage IIIB left testicular cancer. A left high orchidectomy was then performed, and pathological examination revealed embryonal carcinoma. The patient was started on a systemic chemotherapeutic (etoposide, ifosfamide and cisplatin; VIP) regimen. After the third chemotherapy session, metastases had completely disappeared, the serum levels of alpha-fetoprotein and human chorionic gonadotropin beta subunit had normalized and the dermatomyositis symptoms had improved. Cancer is known to be a trigger of dermatomyositis. This case illustrates the importance of palpation of the testes in young patients with dermatomyositis.