title: The therapeutic effect of OK-432 (picibanil) sclerotherapy for benign neck cysts.
abstract: OBJECTIVE
  In general, benign neck cysts are treated by surgical excision. This can present technical difficulties and frequent recurrences, because of insufficient surgery. Sclerosing agents such as OK-432 have been tested for the nonsurgical treatment of these cysts. We have assessed the efficacy of OK-432 sclerotherapy for benign neck cysts.
  
  
  METHODS
  The study group consisted of 75 patients (42 men, 33 women) diagnosed with and treated for benign neck cysts between March 2001 and December 2007 by intralesional injection of OK-432. The liquid content of each cyst was aspirated as much as possible, and the same volume of OK-432 solution was injected. Patients were assessed by ultrasonography or computerized tomography, and therapeutic outcomes and adverse effects were evaluated by patient age, sex, cyst type, and number of injections.
  
  
  RESULTS
  Of the 75 treated patients, 31 (41.3%) showed total shrinkage, seven (9.3%) showed near-total shrinkage (>90% of cyst volume), five (6.6%) showed marked shrinkage (>70% of cyst volume), and 17 (22.7%) showed partial shrinkage (<70% of cyst volume). No response was seen in 15 patients (20%). Despite repeated sclerotherapy, eight patients (10.7%) showed recurrences. Minor adverse effects of therapy included fever, localized pain, and odynophagia but these complications spontaneously disappeared within several days.
  
  
  CONCLUSIONS
  OK-432 sclerotherapy is a safe and effective primary alternative to surgery in patients with benign neck cysts.
authors.affiliation: Department of Otolaryngology, Masan Samsung Hospital, School of Medicine, Sungkyunkwan University, Masan, Korea.
authors.forename: Myung Gu
authors.initials: MG
authors.lastname: Kim
authors.forename: Sun Gon
authors.initials: SG
authors.lastname: Kim
authors.forename: Jun Ho
authors.initials: JH
authors.lastname: Lee
authors.forename: Young Gyu
authors.initials: YG
authors.lastname: Eun
authors.forename: Seung Geun
authors.initials: SG
authors.lastname: Yeo
mesh_terms: D000293:Adolescent; D000328:Adult; D000970:Antineoplastic Agents / Q000008:administration & dosage*; D001935:Branchioma / Q000175:diagnosis / Q000628:therapy*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006258:Head and Neck Neoplasms / Q000175:diagnosis / Q000628:therapy*; D006801:Humans; D018191:Lymphangioma, Cystic / Q000175:diagnosis / Q000628:therapy*; D008297:Male; D008875:Middle Aged; D010844:Picibanil / Q000008:administration & dosage*; D011900:Ranula / Q000175:diagnosis / Q000628:therapy*; D012189:Retrospective Studies; D015911:Sclerotherapy / Q000379:methods*; D013955:Thyroglossal Cyst / Q000175:diagnosis / Q000628:therapy*; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome; D014463:Ultrasonography
chemical_list: D000970:Antineoplastic Agents; D010844:Picibanil