Final answer:
The most common type of vulvar cancer is squamous cell carcinoma, originating from the squamous cells of the epidermis and is more aggressive compared to basal cell carcinoma, which is the most common skin cancer overall.
Step-by-step explanation:
The most common cellular type of vulvar cancer is squamous cell carcinoma. This type of cancer originates in the squamous cells that make up the majority of the skin's upper layers (the epidermis). Squamous cell carcinoma can occur on all parts of the vulva and is characteristically more aggressive than the most common type of skin cancer, basal cell carcinoma, which is noted for appearing in the basal cells of the epidermis and rarely metastasizing. While basal cell carcinoma is the most common form of skin cancer overall, squamous cell carcinoma is specifically the most prevalent type of vulvar cancer.