Final answer:
The malignant growth described is likely Squamous Cell Carcinoma (SCC), a type of skin cancer that appears as a red, crusty papule in sun-exposed areas. It's the second most common skin cancer and can be treated with surgical options when diagnosed early.
Step-by-step explanation:
The malignant growth described in the question, which is an irregular, crusted, red papule occurring in sun-exposed areas of the skin, is likely Squamous Cell Carcinoma (SCC). This type of cancer arises from the squamous cells in the epidermis and is the second most common form of skin cancer.
While melanoma is more fatal and typically presents as asymmetrical brown or black patches with uneven borders and a raised surface, squamous cell carcinoma may appear as a firm red nodule, or a flat lesion with a scaly, crusty surface. SCC is commonly found on parts of the body most susceptible to sun exposure, such as the head, neck, arms, and back.
Diagnosis and treatment of SCC should be managed by a healthcare professional. Treatments can include surgical options and may vary depending on the stage and location of the growth.