Hypertrophic actinic keratosis lesions (yellowish plaques in left image) were treated with a combination of calcipotriol plus fluorouracil had largely disappeared 8 weeks later (right). Disclaimer ...

What Are Actinic Keratoses? Actinic keratoses (AKs) are a common skin condition characterized by rough, red, scaly patches, crusts, or sores on the top layer of skin (see Figures 1 & 2).