What characteristic is typical of melanoma?

Melanoma is a type of skin cancer that typically presents as darkly pigmented moles or spots on the skin. These lesions can be brown, black, or multi-colored and often have irregular borders. The presence of such darkly pigmented moles is a key characteristic of melanoma, differentiating it from other skin conditions. As melanoma progresses, these moles may change in size, shape, and color, which is important for recognition and early intervention.

The other options describe different skin conditions or cancers. Raised, crusty, warty bumps are more characteristic of other forms of skin growths or lesions. Painless ulcers can be associated with various diseases, including some forms of skin cancer, but they are not a typical presentation of melanoma. Itchy rashes can indicate a range of dermatological issues, including allergic reactions or eczema, but they do not specifically relate to melanoma either. Understanding these characteristics aids in proper identification and management of melanoma.