A case of gallstones in an African green monkey ().

Spontaneous cholelithiasis was found in a male African green monkey () at necropsy. Choleliths varied in size, shape and colour. Gallstones were analysed using accepted analytical methods. Results showed that the gallstones were composed of cholesterol and protein in varying proportions. Histologically, the gallbladder showed diffuse mild to moderate lymphocytic infiltration. The etiology of the cholelithiasis in the examined individual remains unknown.