Scleral melanocytosis and oculodermal melanocytosis (nevus of Ota) in Chinese children

Two thousand nine hundred fourteen Chinese children (1510 males and 1404 fe males) were examined for the presence of scleral melanocytosis (SM) and ocu lodermal melanocytosis in a cross-sectional prevalence survey SM was found in 4.9% of boys and 4.1% of girls under the age of 1 year. The peak prevale nce was at 6 years of age, when 44.6% of boys and 46.6% of girls were affec ted. At 18 years of age, only 11.1% of boys and 13.2% of girls had SM. The overall prevalence, regardless of age, was 27.6% in boys and 27.1% in girls . The condition was bilateral in 78% of cases, The medial superior quadrant was the most frequently affected site, and the lateral inferior quadrant w as the least frequently affected site. Oculodermal melanocytosis occurred o nly in one patient; the pigmentation affected the left side of the face and the ipsilateral sclera.