title: Use of chemical ablation with trichloroacetic acid to treat eyelid apocrine hidrocystomas in a cat.
abstract: METHODS
  A 7-year-old Persian cat was evaluated for recurrence of multiple cystic periocular masses. A number of cyst-like lesions had been resected from the left eyelids 18 months earlier, with lesions recurring within 6 months after surgery. The cat had blepharospasm and signs of discomfort following rupture of the largest cyst the day prior to examination. Previous histologic examination of the cysts had revealed apocrine hidrocystomas.
  
  
  RESULTS
  Multiple pigmented nodules were seen around the skin of the upper and lower left eyelids. The nodules were brownish to black, round, soft, and fluid-filled. Signs of pain were not evident during palpation of the nodules.
  
  
  RESULTS
  The largest cyst on the upper eyelid was removed by means of a V-shaped full-thickness excision. Histologic and immunohistochemical examination of the excised tissue confirmed the diagnosis of apocrine hidrocystoma. The remaining periocular cysts were surgically debrided and then treated topically with 20% trichloroacetic acid. All lesions healed rapidly without any signs of discomfort. During a recheck examination 12 months later, the upper and lower left eyelids appeared morphologically normal, and there was no evidence of recurrence.
  
  
  CONCLUSIONS
  Findings suggested that chemical ablation with trichloroacetic acid may be a useful treatment for apocrine hidrocystomas in cats.
authors.affiliation: Graduate Institute of Veterinary Medicine, College of Bioresources and Agriculture, National Taiwan University, Taipei, Taiwan.
authors.forename: Shih-Hung
authors.initials: SH
authors.lastname: Yang
authors.forename: Chen-Hsuan
authors.initials: CH
authors.lastname: Liu
authors.forename: Chia-Da
authors.initials: CD
authors.lastname: Hsu
authors.forename: Lih-Seng
authors.initials: LS
authors.lastname: Yeh
authors.forename: Chung-Tien
authors.initials: CT
authors.lastname: Lin
mesh_terms: D000818:Animals; D001050:Apocrine Glands / Q000473:pathology / Q000601:surgery; D002371:Cat Diseases / Q000188:drug therapy* / Q000473:pathology / Q000601:surgery; D002415:Cats; D002424:Caustics / Q000627:therapeutic use*; D005142:Eyelid Neoplasms / Q000188:drug therapy / Q000473:pathology / Q000601:surgery / Q000662:veterinary*; D018251:Hidrocystoma / Q000188:drug therapy / Q000473:pathology / Q000601:surgery / Q000662:veterinary*; D008297:Male; D009364:Neoplasm Recurrence, Local / Q000662:veterinary; D013544:Sweat Gland Neoplasms / Q000188:drug therapy / Q000473:pathology / Q000601:surgery / Q000662:veterinary*; D016896:Treatment Outcome; D014238:Trichloroacetic Acid / Q000627:therapeutic use*
chemical_list: D002424:Caustics; D014238:Trichloroacetic Acid