title: Treatment of branchial cleft cyst with intracystic injection of OK-432.
abstract: CONCLUSIONS
  The data suggest that branchial cleft cyst (BCC) can be primarily treated with OK-432 sclerotherapy and only the remaining lesions with excision.
  
  
  OBJECTIVE
  To evaluate the effectiveness of sclerotherapy using OK-432 in the treatment of BCC.
  
  
  METHODS
  We treated 12 BCC patients (3 males and 9 females; mean age 25 years) with OK-432 sclerotherapy at an outpatient clinic. The cystic fluids were aspirated and diagnosed by cytomorphology and DNA cytometric analysis to exclude malignancy. The fluid aspirated from the cyst was replaced with an equal volume of OK-432 solution. The sizes of cysts were measured and compared before and after injection. The remaining cysts were excised and histopathologically compared with the excised BCCs that had not been treated with OK-432.
  
  
  RESULTS
  Seven of 12 patients (58%) showed a complete response after OK-432 injection, administered one to three times. Three patients (25%) had only partial response and two (17%) were stationary. Five patients with remaining lesions underwent excision. There was no difficulty in dissecting around the cysts and no increased morbidity during operation. None of the patients had evidence of recurrences or malignancies developing during the follow-up period (mean 21 months, range 17-26 months). There were no major side effects except fever after sclerotherapy.
authors.affiliation: Department of Otolaryngology, Asan Medical Center, University of Ulsan College of Medicine, Republic of Korea. happyfam@paran.com
authors.forename: Jong-Lyel
authors.initials: JL
authors.lastname: Roh
authors.forename: Myung-Whun
authors.initials: MW
authors.lastname: Sung
authors.forename: Kwang
authors.initials: K
authors.lastname: Hyun Kim
authors.forename: Chan
authors.initials: C
authors.lastname: Il Park
mesh_terms: D000293:Adolescent; D000328:Adult; D000553:Ambulatory Care; D000970:Antineoplastic Agents / Q000008:administration & dosage*; D001934:Branchial Region / Q000000981:diagnostic imaging / Q000473:pathology; D001935:Branchioma / Q000000981:diagnostic imaging / Q000473:pathology / Q000628:therapy*; D003131:Combined Modality Therapy; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015552:Injections, Intralesional; D008297:Male; D020360:Neoadjuvant Therapy; D010039:Otorhinolaryngologic Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000628:therapy*; D010844:Picibanil / Q000008:administration & dosage*; D011446:Prospective Studies; D015911:Sclerotherapy; D014057:Tomography, X-Ray Computed
chemical_list: D000970:Antineoplastic Agents; D010844:Picibanil