Ingenol mebutate in the treatment of actinic keratoses: clearance rate and adverse effects

Background: Actinic keratoses are benign intraepithelial skin neoplasms that develop in photoexposed areas and can progress to invasive carcinoma. They are seen frequently in dermatological practice, occurring in 5.1 % of consultations. Ingenol mebutate (IM) was recently approved in Brazil as a topical therapy for field cancerization in actinic keratosis. OBJECTIVE: To evaluate the clearance rate and adverse events in the treatment of actinic keratoses with ingenol mebutate. Methods: A longitudinal, prospective, non-randomized, interventional, open, single-center study was conducted. Patients with actinic keratoses applied ingenol mebutate on a 25cm(2) area of the face and/or scalp for three consecutive days (0.015%) or on the forearm for two days (0.05%). RESULTS: 27 patients completed the protocol, of whom 13 on the face and/or scalp and 14 on the forearm. Complete clearance occurred in 53.8% in the first group and 42.8% in the second. Partial response was observed in 15.4% and 35.7%, respectively. The most common side effects were erythema, edema, desquamation, pruritus, and local erosion. Study limitations: The study had a small sample and was not randomized, double-blind, placebo-controlled, or vehicle-controlled. CONCLUSION: Ingenol mebutate is well-tolerated for the treatment of actinic keratosis, with good patient adherence thanks to the short treatment period.