Abstract
Benign metastasizing leiomyoma (BML), which refers to metastasis of a histologically benign leiomyoma to distant organs, is a very rare condition. Most patients with BML have a history of undergoing surgery for uterine leiomyoma. Herein, we report a case of BML in the abdominal cavity of a 47-year-old premenopausal woman who had undergone hysterectomy for uterine leiomyoma 7 years earlier. PET examination revealed an abdominal tumor on the right side of the abdominal cavity. Laparoscopic resection of the tumor was performed, and histopathological examination of the resected specimen revealed the diagnosis of BML. The histological findings of the tumor were identical to those of the previously resected uterine leiomyoma. There was no evidence of malignancy, such as atypia or mitoses, in the tumor. Immunohistochemistry revealed positive staining for both estrogen receptor and progesterone receptor. Until now, 42 months since the laparoscopic resection, the patient remains free of recurrence.
