Electrolysis Practice Exam

Hard horny papules caused by exposure to the sun are known as?

1. Acne

2. Actinic keratosis

3. Melanoma

4. Psoriasis

The correct answer is: Actinic keratosis

Hard horny papules that develop as a result of prolonged sun exposure are indeed known as actinic keratosis. These skin growths are considered precancerous and typically manifest as rough, scaly patches on sun-exposed areas of the skin. They are a direct consequence of UV radiation causing changes to the skin's outer layer. Actinic keratosis is commonly found on areas such as the face, ears, scalp, or backs of the hands, where the skin has been chronically exposed to sunlight. Over time, if left untreated, these lesions may progress to squamous cell carcinoma, which is why monitoring and potential treatment are important. In contrast, acne refers to a common skin condition characterized by clogged pores leading to pimples and is not necessarily linked to sun exposure. Melanoma is a type of skin cancer that develops from melanocytes, the cells that produce melanin, and is often associated with changes in existing moles or new growths rather than sun-induced papules. Psoriasis is an autoimmune condition that leads to the rapid growth of skin cells, causing scaling and inflammation, and is not specifically related to sun exposure either. Understanding these distinctions helps in identifying skin conditions accurately and emphasizes the importance of monitoring skin health,