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

• Main Authors: Zanndor Jacob del Real-Romo, Carlos Montero-Cantú, Oscar Villegas-Cabello, José Antonio Díaz-Elizondo, Danae Reyes-Salas, Rene Palomo-Hoil, Guillermo Peralta-Castillo, David Martínez-Sánchez, Eduardo Flores-Villalba
• Format: Article
• Language: English
• Published: Hindawi Limited 2014-01-01
• Series: Case Reports in Surgery
• Online Access: http://dx.doi.org/10.1155/2014/439061

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.