title: Oncocytoma of the peripunctum.
abstract: BACKGROUND
  Oncocytoma is rarely found around the lacrimal punctum. We describe a case of oncocytoma of the peripunctum.
  
  
  METHODS
  Case report.
  
  
  RESULTS
  An 88-year-old patient presented with a upper peripunctal mass in the left eye. The tumor was completely excised including the lacrimal punctum and part of the canaliculus. The upper eyelid was reconstructed with a skin flap from the residual skin of the lid, and the lacrimal canaliclus was replaced by a silicone rubber tube. Histologically, the tumor had tubulo-papillary architecture and was composed of two layers of cuboidal cells. The cytoplasm of the tumor cells was rich in eosinophilic granules. The diagnosis was oncocytoma arising from the canaliculus.
  
  
  CONCLUSIONS
  Oncocytoma should be considered in differential diagnosis of a peripunctal mass in elderly patients. In this patient it probably originated from the epithelium of the lacrimal canaliculus.
authors.affiliation: Department of Ophthalmology, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama-machi, Yufu-shi, Oita, 879-5593, Japan. imaizumi@med.oita-u.ac.jp
authors.forename: Masamoto
authors.initials: M
authors.lastname: Imaizumi
authors.forename: Kazuo
authors.initials: K
authors.lastname: Nakatsuka
mesh_terms: D018249:Adenoma, Oxyphilic / Q000473:pathology* / Q000601:surgery; D000369:Aged, 80 and over; D003937:Diagnosis, Differential; D005134:Eye Neoplasms / Q000473:pathology* / Q000601:surgery; D005500:Follow-Up Studies; D006801:Humans; D007765:Lacrimal Apparatus; D008297:Male