title: Intravascular lipoleiomyomatosis: a report of two cases.
abstract: Two cases of intravascular leiomyomatosis (IVL) with histologic features of a lipoleiomyoma (LPL) are reported. Both tumors arose from preexisting uterine leiomyomata. One tumor was found incidentally in a uterus removed for leiomyomata. The other tumor extended up the inferior vena cava into the right side of the heart and presented as a cardiac mass. Although LPL is considered to be a benign lesion, IVL recurs in approximately 10% of reported cases, and must be distinguished from low-grade endometrial stromal sarcoma and leiomyosarcoma with vascular invasion. The combination of features in these cases lends support to the theory that IVL may arise by intravascular extension of a preexisting leiomyoma.
authors.affiliation: Department of Pathology, Rush-Presbyterian-St Luke's Medical Center, Chicago.
authors.forename: R J
authors.initials: RJ
authors.lastname: Brescia
authors.forename: H D
authors.initials: HD
authors.lastname: Tazelaar
authors.forename: J
authors.initials: J
authors.lastname: Hobbs
authors.forename: A W
authors.initials: AW
authors.lastname: Miller
mesh_terms: D000328:Adult; D005187:Fallopian Tubes / Q000473:pathology; D005260:Female; D006801:Humans; D007889:Leiomyoma / Q000473:pathology*; D008875:Middle Aged; D014594:Uterine Neoplasms / Q000473:pathology*; D014599:Uterus / Q000473:pathology