TY - JOUR T1 - MR Imaging of Adenomas of the Nonpigmented Ciliary Epithelium of the Eye JF - American Journal of Neuroradiology JO - Am. J. Neuroradiol. SP - 886 LP - 890 DO - 10.3174/ajnr.A1947 VL - 31 IS - 5 AU - J. Xian AU - Q. Xu AU - Z. Wang AU - B. Yang AU - W. Wei AU - Z. Yan AU - J. Sun AU - J. Shi AU - G.S. Young Y1 - 2010/05/01 UR - http://www.ajnr.org/content/31/5/886.abstract N2 - BACKGROUND AND PURPOSE: ANPCEs are rare benign tumors of the eye arising from the NPCE in adults, which may be clinically mistaken for melanoma. This study was undertaken to delineate clinical and MR imaging features of these tumors. MATERIALS AND METHODS: Clinical presentation and MR imaging findings of 8 patients (6 women and 2 men; median age, 51 years) with pathologically confirmed ANPCEs were retrospectively reviewed. Location, size, shape, margin, signal intensity, and gadolinium-enhancement characteristics of all tumors were evaluated. Signal intensity and degree of enhancement were graded in comparison with the ipsilateral lacrimal gland. RESULTS: MR imaging revealed a circumscribed enhancing mass within the ciliary body of the eye in all 8 patients. The mass was ovoid in 6 patients and spheric in 2. Gadolinium enhancement was marked in 4 lesions and moderate in the other 4. Both T1 and T2 relaxation times were qualitatively identical to those in the lacrimal gland in 2 tumors. In the remaining 6 tumors, the T1 was identical to and the T2 longer than that in the lacrimal gland. CONCLUSIONS: ANPCE should be included in the differential diagnosis of a spheric or ovoid enhancing ciliary body mass with T1 similar to that in the lacrimal gland and T2 equal to or longer than that in the lacrimal gland. ANPCEadenoma of the nonpigmented ciliary body epitheliumFSEfast spin-echoHyperhyperintenseHypohypointenseInflammationintra-operative or pathologic evidence of inflammationIinferiorIOPintraocular pressureIsoisointenseITinferotemporalLleftNnormalNPCEnonpigmented ciliary body epitheliumRrightResectionlocal tumor resectionSsuperiorSEspin-echoSNsuperonasalSTsuperotemporalSVsentinel vessel (prominently dilated episcleral blood vessels overlying the tumor)T1WIT1-weighted imagingT2WIT2-weighted imaging ER -