Oncology Certified Nurse Practice Test 2025 – Complete Exam Prep

Malignant melanoma is indeed classified as a melanoma skin cancer, distinguishing it from nonmelanoma skin cancers. Nonmelanoma skin cancers primarily include basal cell carcinoma and squamous cell carcinoma, both of which are more common and typically less aggressive than melanoma. Basal cell carcinoma arises from the basal cells in the epidermis and is characterized by its slow growth and lower likelihood of metastasis. Squamous cell carcinoma originates from squamous cells and, while it can be more aggressive than basal cell carcinoma, it is still categorized as a nonmelanoma skin cancer.

Carcinosarcoma, though a type of tumor, is not traditionally classified under nonmelanoma skin cancers; it's a malignant neoplasm that contains both carcinoma and sarcoma components, but it doesn't specifically relate to skin cancers like basal cell or squamous cell types do. The designation of nonmelanoma specifically applies to basal and squamous cell carcinoma, making malignant melanoma the correct choice as the option that does not fit within this classification.