良性转移性平滑肌瘤(benign metastasizing leiomyoma,BML)是育龄女性继发于子宫平滑肌瘤的极少见的特殊肿瘤,这种肿瘤组织形态学上表现良性,却具有特殊的生长方式:在子宫平滑肌瘤切除后,出现肺或其它远处器官的肿瘤结节,这些生长方式使得肿瘤的生物学行为并非良性,而呈现侵袭性的生物性行为,导致疾病迁延不愈。发生在肺的 Benign metastasizing leiomyoma (benign metastasizing leiomyoma, BML) is rare in women of childbearing age secondary to uterine leiomyoma tumor, the tumor morphology is benign, but has a special way of growth: in the uterus After the leiomyoma resection, there are tumor nodules in the lung or other distant organs. These growth modes make the biological behavior of the tumor not benign, but exhibit aggressive biological behavior, leading to delayed healing of the disease. Occurs in the lungs