Where does cutaneous melanoma most commonly develop?

Where does cutaneous melanoma most commonly develop?

• A. Pigmented skin lesions often associated with sun exposure.
• B. In brain or spinal cord tissues.
• C. From glial cells.
• D. From meninges surrounding brain and spinal cord.

Answer: (A)

Melanoma starts from melanocytes, the pigment-producing cells in the skin, and the most common place where this cancer begins is the skin itself. UV damage from sun exposure increases risk, so the typical origin is pigmented skin lesions on sun-exposed areas. The other options describe sites that are not the usual starting point for melanoma: primary brain or spinal cord tumors from melanocytes are extremely rare, and tumors arising from glial cells or the meninges are not the common cutaneous melanoma. Thus, skin lesions on sun-exposed areas are the usual origin.

Melanoma starts from melanocytes, the pigment-producing cells in the skin, and the most common place where this cancer begins is the skin itself. UV damage from sun exposure increases risk, so the typical origin is pigmented skin lesions on sun-exposed areas. The other options describe sites that are not the usual starting point for melanoma: primary brain or spinal cord tumors from melanocytes are extremely rare, and tumors arising from glial cells or the meninges are not the common cutaneous melanoma. Thus, skin lesions on sun-exposed areas are the usual origin.