[Benign metastasizing leiomyoma; report of a case].

We report very rare case of benign mestasizing leiomyoma (BML). A 42-year-old female was referred to our hospital presenting with abnormal shadows revealed by a chest X-ray film. Chest computed tomography (CT) scan revealed multiple well-defined nodules in bilateral lung field, suggesting metastatic lung tumor. Further examination could not detect any suspicious primary lesion. Several tumor markers were all within normal limits. Surgical resection was performed to establish diagnosis and treatment. Pathological diagnosis was BML from the uterus myoma which had been resected 5 years before.