Which of the following skin condition is related to sunlight exposure?
Actinic keratosis
Basal cell carcinoma
Molluscum contagiosum
Ichthyosis
Actinic keratosis are small macules or flesh colored papules which are seen on sun-exposed pas of the body in persons of fair complexion. They are considered premalignant, but only 1:1000 lesions per year progress to become squamous cell carcinomas. Molluscum contagiosum is caused by pox virus. The typical lesions are dome-shaped, waxy papules 2-5 mm in diameter with central umbilication. It is usually seen on the face, lower abdomen and genitals. It is common in patients with AIDS with a helper T cell count < 100/mcL. Ref: Berger T.G. (2013). Chapter 6. Dermatologic Disorders. In M.A. Papadakis, S.J. McPhee, M.W. Rabow, T.G. Berger (Eds), CURRENT Medical Diagnosis & Treatment 2014.