Mongolian spots are best described as which?

• A. Benign discoloration bluish gray but usually fades
• B. Malignant lesion requiring biopsy
• C. Red birthmark
• D. Raised scar

Answer: (A)

Mongolian spots are flat, bluish-gray patches present at birth that are benign and usually fade over time. They occur because melanocytes get trapped in the dermis during embryonic development, and the deeper location causes the blue-gray color (a result of how light scatters in deeper skin layers). They’re most common on the sacral area or lower back and are not associated with any pathology, so they typically don’t require biopsy or treatment. This contrasts with other descriptions: a red birthmark would be a vascular lesion, often raised or different in texture; a raised scar is scar tissue; and a malignant lesion would have concerning features and usually prompt biopsy. The takeaway is that Mongolian spots are harmless blue-gray discolorations that tend to fade with age.