title: Contrasting fatty involvement of the right ventricle: lipoma versus lipomatous hypertrophy.
abstract: We report two rare cases of right ventricular lipomatous involvement, and discuss their contrasting diagnostic images and clinical manifestations. Case 1 is a 21-year-old Malay man who presented with recurrent syncope. Transthoracic echocardiography showed a homogeneous discrete mass attached to the right ventricular septum, occupying the right ventricular outflow tract. Cardiac magnetic resonance (MR) imaging showed features consistent with intracardiac lipoma, which was confirmed on histology, upon surgical resection. Case 2, a 73-year-old Caucasian woman, was found to have incidental lipomatous infiltration of the right ventricle on echocardiography and MR imaging. In contrast to the well-defined right ventricular lipoma seen in the first case, lipomatous involvement was manifested as a diffuse homogeneous thickening of the right ventricular free wall. Multimodality imaging allows for a complementary and detailed characterisation of lipomatous masses involving the ventricular septum.
authors.affiliation: Cardiac Department, National University Heart Centre Singapore, Yong Loo Lin School of Medicine, National University of Singapore, 5 Lower Kent Ridge Rd, Singapore.
authors.forename: J
authors.initials: J
authors.lastname: Zhang
authors.forename: E
authors.initials: E
authors.lastname: Chong
authors.forename: P
authors.initials: P
authors.lastname: Chai
authors.forename: K K
authors.initials: KK
authors.lastname: Poh
mesh_terms: D000328:Adult; D000368:Aged; D003937:Diagnosis, Differential; D004452:Echocardiography / Q000379:methods; D005260:Female; D006338:Heart Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging*; D006352:Heart Ventricles / Q000000981:diagnostic imaging / Q000473:pathology; D006801:Humans; D008067:Lipoma / Q000175:diagnosis* / Q000000981:diagnostic imaging*; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008495:Medical Oncology / Q000379:methods; D011859:Radiography; D013575:Syncope / Q000175:diagnosis