Final answer:
In nonwhites, melanomas most commonly appear in less sun-exposed areas such as the soles of the feet and palms of the hands. Early detection of these melanomas, which present as asymmetrical, irregularly bordered, and varied-shade patches, is critical for effective treatment.
Step-by-step explanation:
Melanoma, a type of skin cancer occurring in melanocytes in the epidermis, presents differently across various skin tones. While melanomas typically manifest as large brown or black patches with irregular borders and a raised surface, the location of these melanomas can vary.
For nonwhites, they are likely to present in areas less exposed to the sun, such as the soles of the feet, palms of the hands, under the nails, and mucosal surfaces like the mouth or genital areas.
Due to melanomas being less common in nonwhites but often more deadly because of late detection, it's important to look for signs of melanoma such as asymmetry, irregular borders, and varied shades of brown or black. Early detection is crucial and can significantly increase survival rates.