A nurse is assessing a client who reports a nevus that has increased in size and an irregularly shaped lesion that varies in color.These findings are consistent with which of the following medical diagnoses?

Choice A rationaleBasal cell carcinoma typically presents as a pearly or waxy bump, often with telangiectasia (small blood vessels) and a rolled border. While it can grow, it is less likely to exhibit irregular shape and significant color variation.Choice B rationaleMalignant melanoma is characterized by the "ABCDE" criteria: asymmetry (irregular shape), border irregularity (notched, scalloped, or blurred), color variation (multiple shades of brown, black, red, white, or blue), diameter (usually larger than 6 mm), and evolving (change in size, shape, color, or elevation). The patient's report of an increased size and an irregularly shaped lesion with varying colors strongly suggests malignant melanoma, a serious form of skin cancer arising from melanocytes.Choice C rationaleSquamous cell carcinoma often appears as a firm, red nodule or a scaly, crusty patch. While it can be irregular in shape and may grow, the description of varied colors is less typical of squamous cell carcinoma compared to melanoma.Choice D rationaleKaposi's sarcoma presents as red, purple, or brown blotches or nodules on the skin. It is associated with human herpesvirus 8 (HHV-8) and is more common in individuals with weakened immune systems. The description of an increasing, irregularly shaped, and multicolored lesion is not typical of Kaposi's sarcoma.