Ingenol mebutate gel treatment for actinic cheilitis: report of four cases.

Actinic cheilitis (AC) are premalignant lesions that have an increased risk of malignant transformation. Their treatment, therefore, is essential to prevent carcinogenesis. However, optimal therapy is not well established and different modalities yield variable results. Ingenol mebutate gel has recently been approved by the US Food and Drug Administration for topical treatment of actinic keratosis, with high clearance rates. On the basis of these findings, we report our experience with this drug for the treatment of AC.