Multiple benign metastasizing leiomyomas in the pelvic lymph nodes and biceps muscle: report of a case.

A 47-year-old woman with an earlier history of uterine leiomyoma suffered from multiple recurrent tumors in the retroperitoneal lymph nodes and biceps muscle of the right upper arm. The woman with a right lower abdominal tumor was referred to our hospital. An abdominal computed tomography scan revealed two round nodules with well-defined margins in the retroperitoneum in the pelvis, and echography revealed a similar nodule in the biceps of the right upper arm. A biopsy of the abdominal retroperitoneal tumor demonstrated benign metastasizing leiomyoma (BML). An extirpation of the abdominal tumors was therefore performed. After the operation, false climacteric medical treatment was performed for 3 years and no recurrence has since been observed. This is the first reported case of multiple BML in the lymph nodes and muscle occurring simultaneously.