title: Imaging characteristics of arteriovenous malformations simulating vascular tumors of the temporalis muscle: a report of two cases.
abstract: Arteriovenous malformations (AVMs) of the temporalis muscle are an extremely rare subgroup of head and neck AVMs. The authors report two cases presenting with temporal fossa tumor-like lesions. MRI demonstrated enlargement of the temporalis muscle with hypointensity on T1, hyperintensity on T2 and moderate contrast enhancement. Angiography shows slow arteriovenous shunting with a dense capillary blush of the entire muscle before draining into facial veins. The arterial supply is characteristic of being restricted to the temporalis muscle.
authors.affiliation: Department of Radiology, Ramathibodi Hospital, Bangkok, Thailand. sasikhan@gmail.com
authors.forename: S
authors.initials: S
authors.lastname: Geibprasert
authors.forename: N F
authors.initials: NF
authors.lastname: Fanning
authors.forename: A
authors.initials: A
authors.lastname: Pedroza
authors.forename: K G
authors.initials: KG
authors.lastname: Terbrugge
mesh_terms: D000792:Angiography; D001165:Arteriovenous Malformations / Q000175:diagnosis*; D003287:Contrast Media; D003937:Diagnosis, Differential; D003952:Diagnostic Imaging; D004621:Embolization, Therapeutic / Q000379:methods; D005260:Female; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D008279:Magnetic Resonance Imaging; D008297:Male; D013684:Telangiectasis / Q000175:diagnosis; D013699:Temporal Arteries / Q000002:abnormalities; D013703:Temporal Muscle / Q000098:blood supply*; D014057:Tomography, X-Ray Computed; D019043:Vascular Neoplasms / Q000175:diagnosis*; D014680:Veins / Q000002:abnormalities; D055815:Young Adult
chemical_list: D003287:Contrast Media