title: Progressive angiomyolipoma with inferior vena cava tumor thrombus.
abstract: A 45-year-old man presented with an incidentally discovered benign renal angiomyolipoma. This lesion initially demonstrated renal vein involvement. On referral to our institution 3 years later, there was interval progression of tumor thrombus to the intrahepatic inferior vena cava. Intravascular extension of benign angiomyolipoma, though rare, has been reported. We present a new example and review the literature concerning this unusual complication of a common renal neoplasm.
authors.affiliation: Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia 19104, USA.
authors.forename: M R
authors.initials: MR
authors.lastname: Bernstein
authors.forename: S B
authors.initials: SB
authors.lastname: Malkowicz
authors.forename: E S
authors.initials: ES
authors.lastname: Siegelman
authors.forename: M
authors.initials: M
authors.lastname: Acker
authors.forename: J E
authors.initials: JE
authors.lastname: Tomaszewski
authors.forename: A J
authors.initials: AJ
authors.lastname: Wein
mesh_terms: D018207:Angiomyolipoma / Q000175:diagnosis* / Q000473:pathology; D018450:Disease Progression; D006801:Humans; D007668:Kidney / Q000000981:diagnostic imaging / Q000473:pathology; D007680:Kidney Neoplasms / Q000175:diagnosis* / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009360:Neoplastic Cells, Circulating / Q000473:pathology; D012082:Renal Veins / Q000000981:diagnostic imaging / Q000473:pathology; D014057:Tomography, X-Ray Computed; D014682:Vena Cava, Inferior / Q000000981:diagnostic imaging / Q000473:pathology