Pulmonary benign metastasizing leiomyomas: a case series of 23 patients at a single facility.

PBML is a rare disease and should be treated by individualization according to the patients' age, symptoms and extent of lesion. Curative surgery for patients with limited lesions can achieve the complete response. For patients that are young and asymptomatic, close observation is recommended as the first choice. All patients should undergo long-term surveillance.