title: A phase I trial of topically applied trans-retinoic acid in cervical dysplasia-clinical efficacy.
abstract: Forty-two patients were entered into a phase I trial to evaluate the vitamin A derivative, trans-retinoic acid, in cervical intraepithelial neoplasia. Treatment consisted of four consecutive 24-h applications of retinoids via an inert collagen sponge in a cervical cap. Patients were followed for response at 3-month intervals using cytology, colposcopy, and selected biopsies. Thirty-six patients were evaluable (mild dysplasia, 13; moderate dysplasia, 17; severe dysplasia, 6) with follow-up from 5 to 18 months. Complete regression was seen in 2/14 (14%) patients treated with concentrations of 0.05%----0.1167% and in 10/22 (45%) patients treated with concentrations of 0.1583%----0.484% (p less than 0.05). One patient with negative biopsies at 12 months has subsequently recurred at 18 months.
mesh_terms: D000287:Administration, Topical; D004305:Dose-Response Relationship, Drug; D004341:Drug Evaluation; D005260:Female; D006801:Humans; D014212:Tretinoin / Q000627:therapeutic use*; D002578:Uterine Cervical Dysplasia / Q000188:drug therapy*
chemical_list: D014212:Tretinoin