title: An open, comparative clinical study on the efficacy and safety of 10% trichloroacetic acid, 25% trichloroacetic acid and cryotherapy for verruca plana.
abstract: OBJECTIVE
  Although there are several methods to treat Verruca plana, warts do not respond well to the common therapeutic options. In this study, we compared the safety and efficacy of 10% trichloroacetic acid, 25% trichloroacetic acid, and cryotherapy for the treatment of warts caused by Verruca plana.
  
  
  METHODS
  Ten percent and 25% trichloroacetic acid were applied to warts weekly until all lesions cleared. Cryotherapy was performed by liquid nitrogen spray for 5-10 seconds for each lesion per week until the lesions cleared. The number of Verruca plana lesions and adverse effects were evaluated five times during the treatment (the initial visit, week 2, week 4, week 6, and week 8).
  
  
  RESULTS
  The number of lesions decreased through week 8 for all three treatments, and the reductions in the mean numbers of lesions were statistically similar (p > 0.05). Those in the cryotherapy group exhibited more erythema, pain, erosions, bullae, and hyperpigmentation (p < 0.001, p < 0.001, p < 0.001, p < 0.05, and p = 0.001, respectively) than those in either TCA group. Itching was more common among those in the trichloroacetic acid groups than in the cryotherapy group (p < 0.05). Additionally, hyperpigmentation, erythema, pain, and itching were more frequent in the 25% trichloroacetic acid group than in the 10% trichloroacetic acid group (p < 0.001), (p < 0.05), (p < 0.05), (p < 0.05).
  
  
  CONCLUSIONS
  Ten percent trichloroacetic acid, 25% trichloroacetic acid, and cryotherapy are effective methods to treat Verruca plana. 10% trichloroacetic acid offers a safer and easier treatment than either 25% trichloroacetic acid or cryotherapy.
authors.affiliation: Kars State Hospital , Kars , Turkey and.
authors.forename: Fatma Pelin
authors.initials: FP
authors.lastname: Cengiz
authors.forename: Nazan
authors.initials: N
authors.lastname: Emiroglu
mesh_terms: D000287:Administration, Topical; D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D003131:Combined Modality Therapy; D017679:Cryotherapy; D004305:Dose-Response Relationship, Drug; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D030361:Papillomavirus Infections / Q000188:drug therapy / Q000628:therapy*; D011446:Prospective Studies; D014238:Trichloroacetic Acid / Q000008:administration & dosage / Q000627:therapeutic use*; D014860:Warts / Q000188:drug therapy / Q000628:therapy*; D055815:Young Adult
chemical_list: D014238:Trichloroacetic Acid
keywords: Cryotherapy; Verruca plana; trichloroacetic acid