title: Thrombosed cavernous hemangioma of the anterior mediastinum in a five-year-old boy: CT and MR appearances.
abstract: We report a case of histologically proven mediastinal hemangioma with clot formation. Although contrast-enhanced CT demonstrated the multilocular nature by enhancement of the septum, each locular space was not enhanced by the contrast medium. On both T1- and T2- weighted MR images, the signal intensity of the mass was very high and unhomogenous with low intensity septa. Clot formation in the cavernous lumen can be a reason for the lack of vascularity on contrast-enhanced CT. MRI is useful in diagnosing thrombosed hemangioma because of its high sensitivity to methemoglobin formation.
authors.affiliation: Department of Radiology, Shiga University of Medical Science, Otsu, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Takahashi
authors.forename: K
authors.initials: K
authors.lastname: Murata
authors.forename: M
authors.initials: M
authors.lastname: Mori
authors.forename: K
authors.initials: K
authors.lastname: Shimoyama
authors.forename: R
authors.initials: R
authors.lastname: Morita
mesh_terms: D002675:Child, Preschool; D006392:Hemangioma, Cavernous / Q000175:diagnosis* / Q000000981:diagnostic imaging; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008479:Mediastinal Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging; D008482:Mediastinum / Q000473:pathology; D013927:Thrombosis / Q000175:diagnosis* / Q000473:pathology; D014057:Tomography, X-Ray Computed