title: [Composition of biliary calculi and possible causes of their formation].
abstract: The ingredients and chemical content of 135 biliary calculi from 120 operated patients was studied roentgenostructurally, with infra-red spectrophotometry and visually. Based on the results obtained, it proved feasible to differentiate 4 groups of calculi differing in their content: cholesterol, metallocholesterol, cholesterolphosphatide, phosphatide-protein.
mesh_terms: D002118:Calcium / Q000032:analysis; D002244:Carbon / Q000032:analysis; D002769:Cholelithiasis / Q000209:etiology / Q000378:metabolism; D002784:Cholesterol / Q000032:analysis*; D004573:Electrolytes / Q000032:analysis*; D006801:Humans; D006859:Hydrogen / Q000032:analysis; D007501:Iron / Q000032:analysis; D008274:Magnesium / Q000032:analysis; D009584:Nitrogen / Q000032:analysis; D010100:Oxygen / Q000032:analysis; D010743:Phospholipids / Q000032:analysis*; D010758:Phosphorus; D011506:Proteins / Q000032:analysis*
chemical_list: D004573:Electrolytes; D010743:Phospholipids; D011506:Proteins; D010758:Phosphorus; D002244:Carbon; D006859:Hydrogen; D002784:Cholesterol; D007501:Iron; D008274:Magnesium; D009584:Nitrogen; D010100:Oxygen; D002118:Calcium
vernacular_title: O sostave zhelchnykh kamneĭ i vozmozhnykh prichinakh ikh obrazovaniia