PT  - JOURNAL ARTICLE
AU  - B.T. Yang
AU  - Y.J. Liu
AU  - Y.Z. Wang
AU  - X.Y. Wang
AU  - Z.C. Wang
TI  - CT and MR Imaging Findings of Periorbital Lipogranuloma Developing after Endoscopic Sinus Surgery
AID  - 10.3174/ajnr.A3182
DP  - 2012 Dec 01
TA  - American Journal of Neuroradiology
PG  - 2140--2143
VI  - 33
IP  - 11
4099  - http://www.ajnr.org/content/33/11/2140.short
4100  - http://www.ajnr.org/content/33/11/2140.full
SO  - Am. J. Neuroradiol.2012 Dec 01; 33
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. DCEdynamic contrast-enhancedESSendoscopic sinus surgeryHUHounsfield unitsTICtime-intensity curveTpeaktime to peak enhancementWRwashout ratio