Iatrogenic myomas: new class of myomas?

Parasitic myomas, defined as extrauterine seeding of leiomyoma, have been reported since the early 1900s. These myomas were thought to be spontaneously occuring, separate from the uterus but still hormone-dependent and can cause symptoms. What seemed to be a rare disorder developing from the natural history of pedunculated myomas has become increasingly reported over the last decade. Because it is still a rare disorder, the literature is limited to case reports. Herein, we review the literature and provide an analytic review of recent case reports, with emphasis on etiology, trends, and risk factors, to increase awareness of this problematic entity.