title: The new fluor-hydroxy pulse peel. A combination of 5-fluorouracil and glycolic acid.
abstract: BACKGROUND
  Chemical peels have become an increasingly popular method to treat a myriad of benign skin disorders. Individually, glycolic acid (GA) and 5-fluorouracil (5-FU) have been proven efficacious in the treatment of actinically damaged skin. However, to our knowledge the literature lacks a study examining the synergistic effects of these two agents in the treatment of actinic keratoses (AKs) and solar damage.
  
  
  OBJECTIVE
  The aim of the study was to determine if a combination of 5-FU and 70% GA, when delivered in pulse doses, would have greater efficacy than using GA alone in destroying precancerous AKs and improving the cosmetic appearance of the skin.
  
  
  METHODS
  A prospective randomized controlled study was designed with 18 subjects who had clinically apparent facial AKs. Each patient was treated with the combination of 5-FU and GA to one half of the face, while GA alone was applied to the other half, in a randomized fashion. A before-treatment count of the number of AKs present on each half of the face was recorded and pretreatment photographs were taken. The solutions were applied weekly to all patients for an 8-week period. A posttreatment count of AKs on each half of the face along with posttreatment photographs followed at 6 months.
  
  
  RESULTS
  The combination of 5-FU and GA cleared 91.94% of AKs at a 6-month follow-up period as compared with 19.67% clearing by GA alone. There were no significant side effects reported with the combination peel.
  
  
  CONCLUSIONS
  The fluor-hydroxy pulse peel applied in a pulse dose regimen not only provides cosmetic improvement, but more importantly, has a therapeutic effect on ablating premalignant AKs. This therapeutic effect occurs without the usual morbidity associated with using 5-FU alone in a nonpulsed dosage. Additionally, it is evident that the superficial peeling induced by alpha hydroxy acids may improve cosmesis of actinically damaged skin, but the GA alone cannot destroy a significant number of AKs.
authors.affiliation: Department of Dermatology, College of Physicians & Surgeons, Columbia University, New York, New York, USA.
authors.forename: G M
authors.initials: GM
authors.lastname: Marrero
authors.forename: B E
authors.initials: BE
authors.lastname: Katz
mesh_terms: D000279:Administration, Cutaneous; D000328:Adult; D000368:Aged; D002615:Chemexfoliation; D004334:Drug Administration Schedule; D004357:Drug Synergism; D005260:Female; D005472:Fluorouracil / Q000008:administration & dosage*; D006016:Glycolates / Q000008:administration & dosage*; D006801:Humans; D007641:Keratolytic Agents / Q000008:administration & dosage*; D007642:Keratosis / Q000188:drug therapy* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D016896:Treatment Outcome
chemical_list: D006016:Glycolates; D007641:Keratolytic Agents; C031149:glycolic acid; D005472:Fluorouracil