Studies on black gallstones with calcium carbonate and calcium carbonate gallstones.

Abstract

The black gallstones are mainly composed of a polymer of bilirubinates and inorganic calcium salts.
86 cases of black stones were classified into 3 types according to macroscopic features and the analysis of infrared spectroscopy. In 48 cases, the black stones contained inorganic calcium salts and in 37 cases, contained calcium carbonate mainly of the calcite type.
On the other hand, the calcium carbonate stone cases including limy bile cases were mainly composed of calcium carbonate (aragonite type).
The black stone with or without calciu m carbonate tended to have mild inflammation in gallbladder pathologically, compared with calcium carbonate stones. From these results of the comparative studies it was suspected that the black stones with calcium carbonate differed from the calcium carbonate stones in the pathogenesis of gallstone.