A dry, round, pink to red, slow-growing lesion on sun-exposed areas of an older fair-skinned adult that does not heal. What is the most likely diagnosis?

A dry, round, pink to red, slow-growing lesion on sun-exposed areas of an older fair-skinned adult that does not heal. What is the most likely diagnosis?

• A. Basal Cell Carcinoma
• B. Actinic Keratosis
• C. Melanoma
• D. Seborrheic Keratosis

Answer: (B)

Sun exposure over years causes actinic keratosis, a premalignant change in the skin that shows up on sun‑exposed areas of older, fair-skinned individuals as a dry, rough patch or small plaque that is pink to red and grows slowly. This nonhealing, sandpaper-like lesion fits best with actinic keratosis because it reflects chronic UV damage and the potential to progress to squamous cell carcinoma if left untreated. Basal cell carcinoma typically looks like a pearly, translucent papule with telangiectasias and possible central ulceration, not a dry, sandpaper-like patch. Melanoma usually presents with irregular pigment and borders rather than a uniform pink to red, dry lesion. Seborrheic keratosis is the benign “stuck-on,” waxy, pigmented lesion, not a new dry patch on sun-exposed skin.

Sun exposure over years causes actinic keratosis, a premalignant change in the skin that shows up on sun‑exposed areas of older, fair-skinned individuals as a dry, rough patch or small plaque that is pink to red and grows slowly. This nonhealing, sandpaper-like lesion fits best with actinic keratosis because it reflects chronic UV damage and the potential to progress to squamous cell carcinoma if left untreated. Basal cell carcinoma typically looks like a pearly, translucent papule with telangiectasias and possible central ulceration, not a dry, sandpaper-like patch. Melanoma usually presents with irregular pigment and borders rather than a uniform pink to red, dry lesion. Seborrheic keratosis is the benign “stuck-on,” waxy, pigmented lesion, not a new dry patch on sun-exposed skin.