Focal Scalp Hair Heterochromia in an Infant

Congenital red hair heterochromia in the background of blond scalp hair

“…Heterochromia has been known to be impacted by genetics, metabolic defects, nutritional deficiencies, exposure to chemicals, injury of the follicle, and drugs 2 . There are reports recording the presence of light‐colored hair in the background of darker hair 1,3 and one case of dark hair in the background of lighter hair, 4 presumably due to a relative increase or decrease in eumelanin in the heterochromic hair. This is the first report of congenital red hair heterochromia of the scalp amidst a background of blond hair, with a relative increase in pheomelanin in the heterochromic hair.…”