Incidental Benign Metastasizing Leiomyoma in a Patient with Bone Sarcoma: A Case Report

Abstract EN

Background.

The benign metastasizing leiomyoma is an exceptionally rare entity; it presents with ectopic leiomyoma nodules with a benign pattern.

Symptoms vary according to the anatomic location.

The diagnosis is histopathological, usually in patients with history of hysterectomy.

Case Presentation.

A 36-year-old female with 2-month history of left knee pain was diagnosed with bone fibrosarcoma.

A CT scan showed pulmonary nodules.

The patient started neoadjuvant chemotherapy.

Conservative surgery of pelvic limb was achieved.

A new CT scan reported pulmonary nodules that remained in relation to the previous CT.

A nodule resection by thoracotomy and TOB (transoperative biopsy) was performed.

The final pathology report described benign proliferative lesions consistent with benign metastatic leiomyoma.

Conclusions.

Benign metastatic leiomyoma is a rare condition presenting with uterine and extrauterine nodules most commonly in the lung.

The diagnosis is histopathological.

The surgical procedure must be reserved for selected patients.