Pigment Gallstones : Epidemiology

Pigment Gallstones - Epidemiology: Pigment gallstones are much more common in Asia and Africa. In the US, they make up only 20% to 25% of gallstones, of which the majority are black pigment gallstones (shown here) and the remainder are brown pigment gallstones. Like cholesterol gallstones, they develop more frequently in women and with advancing age.