Non-surgical intervention for retroperitoneal lymphogenic and pulmonary metastases of a benign leiomyoma: treatment with ulipristal acetate.

This case report describes a very rare coexistence of retroperitoneal lymphogenic and pulmonary metastases of a benign leiomyoma: benign metastasising leiomyoma (BML). Despite surgical treatment growth of multiple nodules in the lungs, omentum, mesenterium and retroperitoneum was observed by CT scan. We started off-label ulipristal acetate treatment with impressive results. The lesions on the CT scan disappeared, and the patient was asymptomatic after treatment.