title: Orbital oncocytoma: evaluation with dynamic contrast-enhanced magnetic resonance imaging using a time-signal intensity curve and positive enhancement integral images.
abstract: Oncocytomas, which are benign epithelial tumors filled with abundant mitochondria, arise from ductal cells. Oncocytomas rarely occur in the orbit. We present a case of pathologically proven orbital oncocytoma of the lacrimal gland studied by dynamic contrast-enhanced magnetic resonance imaging (DCE MRI). DCE MRI has potential as an adjunct to conventional MRI in the differential diagnosis and tumor margin delineation of orbital oncocytoma. Simple assessments of the time-signal intensity curve, semiquantitative parameters, and post-processing positive enhancement integral images should be considered in the evaluation of orbital masses found on MRI.
authors.affiliation: Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Unit 1482, Houston, TX 77030, USA; Department of Radiology, Faculty of Medicine, Chulalongkorn University and The King Chulalongkorn Memorial Hospital, 1873 Rama IV Road, Pathumwan, Bangkok 10330, Thailand. Electronic address: njittapiromsak@mdanderson.org.
authors.forename: Nutchawan
authors.initials: N
authors.lastname: Jittapiromsak
authors.affiliation: Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Unit 1472, Houston, TX 77030, USA. Electronic address: ping.hou@mdanderson.org.
authors.forename: Ping
authors.initials: P
authors.lastname: Hou
authors.affiliation: Department of Pathology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Unit 0085, Houston, TX 77030, USA. Electronic address: mdwillia@mdanderson.org.
authors.forename: Michelle D
authors.initials: MD
authors.lastname: Williams
authors.affiliation: Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Unit 1482, Houston, TX 77030, USA. Electronic address: linda.chi@mdanderson.org.
authors.forename: T Linda
authors.initials: TL
authors.lastname: Chi
mesh_terms: D018249:Adenoma, Oxyphilic / Q000000981:diagnostic imaging*; D000328:Adult; D003287:Contrast Media; D003937:Diagnosis, Differential; D005134:Eye Neoplasms / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D014057:Tomography, X-Ray Computed
chemical_list: D003287:Contrast Media
keywords: Dynamic contrast-enhanced magnetic resonance imaging; Magnetic resonance imaging; Oncocytoma; Orbit