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Benign Pulmonary Metastasizing Leiomyoma: A Case Report

Waleed Mohammed Alselwi, Samir Taha Alfotih, Faisal Azam, Ahmed Alwabari


Introduction: Benign metastasizing leiomyoma (BML) is a rare disease, the first case of BML was reported by Steiner in 1939. It can affect any age group ranging from 30 to 75 years, but most commonly found in late childbearing period. Leiomyoma of the uterus can metastasize to different organs but lung is the most common site, hence the term pulmonary benign metastasizing leiomyoma (PBML) is used. PBML is mostly diagnosed incidentally on imaging studies for other conditions. It can occur many years after hysterectomy for Leiomyoma of uterus.

Presentation of the cases: We report a case of a 51 years old lady with chronic cough and pulmonary nodules on a computerized  tomography (CT) scan. She was referred to our hospital for the management of the probable metastatic cancer. Her diagnosis was challenging but a past history of hysterectomy, radiological findings and the histopathology helped us to diagnose this rare condition of benign metastasizing leiomyoma (BML).

Conclusion: Pulmonary benign metastasizing leiomyoma is rare benign disease. It should be considered as the probable diagnosis in a female patient with pulmonary nodules and a previous history of surgery for leiomyoma of uterus.  Pathological differentiation from leiomyosarcoma and other malignant metastatic condition is essential. Prognosis of PBML after surgical and/ or hormonal treatment is good.

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