Where are Mongolian spots most commonly located in newborns?

• A. Lips
• B. Earlobes
• C. Sacral area
• D. Chest

Answer: (C)

Mongolian spots are a benign congenital dermal melanocytosis. They occur when melanocytes become trapped in the dermis during fetal development, producing a flat, bluish-gray patch that’s usually present at birth. The most common location for these patches is the sacral area—the lower back and buttocks—especially in infants with darker skin tones. Although they may appear on other areas like the buttocks, thighs, or shoulders, the sacral region is the classic and most frequent site. These spots typically fade gradually over the first few years of life without treatment, helping distinguish them from conditions that require intervention.