Which biopsy method is used for neck lesions suspicious for skin cancer to ensure a full-thickness sample?

• A. Punch biopsy
• B. Shave biopsy
• C. Incisional biopsy
• D. Full-thickness biopsy

Answer: (D)

Because evaluating skin cancer on the neck requires seeing all layers of the skin, you need a sample that includes the entire thickness from the epidermis through the dermis and into subcutaneous tissue. Shave biopsies remove only surface layers, so they often miss how deeply a cancer has invaded. Punch biopsies go through the epidermis and dermis, but depending on the lesion’s depth, they may not capture the deepest invasion or the full extent of the lesion. Incisional biopsies take only a portion of the lesion, which can miss the most representative depth of invasion. A full-thickness biopsy is designed to sample through the entire skin thickness in one piece, giving complete information about invasion depth and margins, which is essential for accurate diagnosis and treatment planning. This is why it’s the best choice for neck lesions suspicious for skin cancer when a full-depth assessment is required.