title: MR imaging of adenomas of the nonpigmented ciliary epithelium of the eye.
abstract: OBJECTIVE
  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.
  
  
  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.
authors.affiliation: Department of Radiology, Capital Medical University Beijing Tongren Hospital, Beijing, China. cjr.xianjunfang@vip.163.com
authors.forename: J
authors.initials: J
authors.lastname: Xian
authors.forename: Q
authors.initials: Q
authors.lastname: Xu
authors.forename: Z
authors.initials: Z
authors.lastname: Wang
authors.forename: B
authors.initials: B
authors.lastname: Yang
authors.forename: W
authors.initials: W
authors.lastname: Wei
authors.forename: Z
authors.initials: Z
authors.lastname: Yan
authors.forename: J
authors.initials: J
authors.lastname: Sun
authors.forename: J
authors.initials: J
authors.lastname: Shi
authors.forename: G S
authors.initials: GS
authors.lastname: Young
mesh_terms: D000236:Adenoma / Q000473:pathology*; D002924:Ciliary Body / Q000473:pathology*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014604:Uveal Neoplasms / Q000473:pathology*