Malignant melanoma is typically characterized by which of the following features?

Malignant melanoma is indeed characterized by features such as an irregular shape, discoloration, changes in color, and a larger size compared to benign moles. These characteristics are critical in distinguishing malignant melanoma from benign skin lesions. Specifically, the irregular shape indicates that the mole or spot has uneven borders, which can be a warning sign of cancer. Discoloration and changes in color often manifest as variations in pigmentation, where different shades may appear within the same mole, further signaling the potential malignancy. Additionally, a larger size, typically over 6 mm, is a common indicator that a mole may be malignant.

In contrast, the other described characteristics do not align with the common presentation of malignant melanoma. Regularly shaped and light-colored moles generally indicate benign growths. Similarly, small and uniform pigmented lesions as well as bright-colored oval shapes do not typically represent the atypical features associated with malignant melanoma that require further investigation. Understanding these distinctions is crucial for proper identification and timely intervention in potential cases of skin cancer.