[Primary testicular leiomyosarcoma]

Leiomyosarcoma is a malignant soft-tissue cancer arising from tissues containing smooth muscle. It commonly occurs in the gastrointestinal system and retroperitoneum, but is rare in the genito-urinary system. We experienced a case of primary testicular leiomyosarcoma. A 71-year-old man presented with painless swelling of the right scrotal contents for 4 months. A high orchiectomy was performed. Histological examination revealed primary testicular leiomyosarcoma. The patient did not receive any adjuvant therapy. Seven months after the operation, there has been no recurrence. Cases of primary intratesticular leiomyosarcoma are rare. To the best of our knowledge, only sixteen cases have been reported in the literature.