A client has a small, red, scaling lesion that is sitting on an elevated base on the forehead. The client states that lesion began several weeks before and will not heal. The nurse recognized this lesion as possible:
1. Squamous cell carcinoma.
2. Melanoma.
3. Psoriases.
4. Seborrheic keratosis.
Squamous cell carcinoma.
Rationale: Squamous cell carcinoma consists of tumors of the outer epidermis that occur with frequent exposure to the sun. The scaling lesions sit on an elevated base with an irregular border that may itch or be a nonhealing lesion after minor trauma. Melanomas appear as changing or unusual moles with an irregular border, an uneven surface, and are of varied size and shape. Psoriasis lesions are erythematous papules and placques with silver-white scales that are sharply demarcated. Seborrheic keratosis lesions are warty, dirty-yellow to black papules with sharp margins.
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