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[Benign metastatic leiomyoma of the lung].

The authors report on the case of a woman of 41 years of age presenting with asymptomatic multiple circular foci in the lung that were primarily suspected of being malignomas. Diagnosis of benign metastasising leiomyomas was confirmed for bilateral multiple circular foci suspected of lung metastasising originating from an unknown tumour of the lung. This diagnosis was achieved by open biopsy. The seemingly contradictory diagnosis of a benign but metastasising tumour is characteristic of a rare disease pattern that, however, is well documented in the literature. The course of the disease is compared with the data given in the literature.