Question

The most common type of skin cancer is:

• A. Melanoma
• B. Basal cell carcinoma
• C. Squamous cell carcinoma
• D. Merkel cell carcinoma

Hint:

“BCC = most common, least dangerous; Melanoma = less common, most dangerous.”

Answer 1

The Correct Option is B

Step 1: Understanding skin cancer
Skin cancer occurs when skin cells grow uncontrollably due to DNA damage, often caused by prolonged exposure to ultraviolet (UV) radiation from the sun or tanning beds. It is the most common form of cancer globally, with different subtypes depending on the cells involved.

Step 2: The most common type – Basal cell carcinoma (BCC)
Basal cell carcinoma accounts for approximately 80% of all skin cancers. It arises from the basal cells located in the deepest layer of the epidermis. BCC usually develops on sun-exposed areas such as the face, neck, and arms.

Step 3: Key features of BCC

• Slow-growing and rarely metastasizes.
• Often appears as a pearly or flesh-colored bump.
• May present with visible blood vessels and a central depression or ulcer

Step 4: Why other options are incorrect

• Melanoma: Less common but far more aggressive; originates from melanocytes.
• Squamous cell carcinoma: Second most common; arises from squamous cells and has a higher chance of spreading than BCC.
• Merkel cell carcinoma: Rare and aggressive neuroendocrine skin cancer, not the most common type.

Step 5: Clinical importance
Early detection of BCC ensures a high cure rate through surgical removal, cryotherapy, or topical treatments. Although not typically life-threatening, untreated BCC can cause significant local tissue damage.

Basal cell carcinoma = Most common type of skin cancer