Which type of carcinoma is characterized by irregular, crusted lesions typically found on sun-exposed areas?

Squamous cell carcinoma is indeed characterized by irregular, crusted lesions that frequently appear on sun-exposed areas of the skin. This type of skin cancer often develops from the squamous cells, which are flat cells located in the outer layer of the skin. The lesions can become scaly, red, or even ulcerated, which contributes to their crusted appearance. Sun exposure is a significant risk factor for this type of carcinoma, as ultraviolet (UV) radiation can damage the skin and lead to cellular mutations.

The prominence of these lesions in areas exposed to sunlight, such as the face, ears, neck, and backs of the hands, highlights the importance of sun protection. Early detection and treatment are key in managing squamous cell carcinoma, as it can be more aggressive than other skin cancers if not addressed promptly.