RT Journal Article
SR Electronic
T1 CT and MR Imaging Findings of Periorbital Lipogranuloma Developing after Endoscopic Sinus Surgery
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
DO 10.3174/ajnr.A3182
A1 B.T. Yang
A1 Y.J. Liu
A1 Y.Z. Wang
A1 X.Y. Wang
A1 Z.C. Wang
YR 2012
UL http://www.ajnr.org/content/early/2012/06/21/ajnr.A3182.abstract
AB SUMMARY: Periorbital lipogranuloma is a rare complication after ESS and presently lacks specific imaging reports. The purpose of this study was to describe the CT and MR imaging features of periorbital lipogranuloma. We retrospectively reviewed 9 patients with histology-confirmed periorbital lipogranuloma. All 9 patients underwent CT and MR imaging. Five lipogranulomas were located in the right eyelid and 4 in the left eyelid, which extended into the extraconal space to some degree. The lesions displayed an irregular shape and had an ill-defined margin. Multiple, specked, or nodular foci containing fat were scattered within these lesions. The lesions demonstrated moderate heterogeneous contrast enhancement on contrast-enhanced MR imaging. The TICs showed a persistent pattern (type I) in 6 patients undergoing DCE MR imaging. Thus, an ill-defined, irregular-shaped periorbital mass with multiple foci containing fat, combined with an ESS history, can help to accurately diagnose this entity. Abbreviations DCEdynamic contrast-enhancedESSendoscopic sinus surgeryHUHounsfield unitsTICtime-intensity curveTpeaktime to peak enhancementWRwashout ratio