[Pathogenesis of hyperoxalurias and calcium oxalate calculi in intestinal diseases].

Hyperoxaluria and calcium oxalate lithiasis have a multifactorial genesis in bowel diseases. The augmented synthesis of oxalic acid in the liver is of minor importance. A diminished bacterial degradation is to asses up to day only hardly. The increasing absorption is of highest importance by deficient production of calcium oxalate in the intestinal tract and by increasing permeability of colonic mucosa above all in steatorrhoea or in patients with augmented calcium absorption. The crystallization of calcium oxalate in the urine is promoted by shortage of vitamin A, citrate, zinc or magnesium.