title: Persistent high grade flurodeoxyglucose uptake in lipomatous hypertrophy of the interatrial septum on dual time point imaging and with ambient warming.
abstract: Lipomatous hypertrophy of the interatrial septum (LHIS) is a relatively uncommon disorder of the heart characterized by benign fatty infiltration of the interatrial septum that usually spares the fossa ovalis. LHIS showing flurodeoxyglucose uptake has been reported, and is presumed to be due to activated brown adipose tissue (BAT). We here report a case of a patient who had isolated mediastinal uptake in interatrial septum, mimicking metastasis. Rescanning with external warming to deactivate BAT and a delayed time point image was done, which showed persistent and progressively increasing metabolic uptake respectively, suggesting that LHIS uptake might be unrelated to activated BAT or inflammation.
authors.affiliation: Department of Nuclear Medicine, Kovai Medical Centre and Hospital, Coimbatore, Tamil Nadu, India.
authors.forename: K K
authors.initials: KK
authors.lastname: Kamaleshwaran
authors.affiliation: Department of Medical Oncology, Kovai Medical Centre and Hospital, Coimbatore, Tamil Nadu, India.
authors.forename: N
authors.initials: N
authors.lastname: Sudhakar
authors.affiliation: Department of Nuclear Medicine, Kovai Medical Centre and Hospital, Coimbatore, Tamil Nadu, India.
authors.forename: D K
authors.initials: DK
authors.lastname: Shibu
authors.affiliation: Department of Nuclear Medicine, Kovai Medical Centre and Hospital, Coimbatore, Tamil Nadu, India.
authors.forename: E R R
authors.initials: ER
authors.lastname: Kurup
authors.affiliation: Department of Nuclear Medicine, Kovai Medical Centre and Hospital, Coimbatore, Tamil Nadu, India.
authors.forename: Ajit
authors.initials: A
authors.lastname: Shinto
keywords: Brown adipose tissue; flurodeoxyglucose positron emission tomography computed tomography; lipomatous hypertrophy