A Bezoar Composed of Bilirubin Calcium, Calcium Carbonate, and Fatty Acid Calcium

Figure 4

Infrared spectroscopy images. Infrared spectroscopy revealed that the external layer of the bezoar was composed of fatty acid calcium (61%) and bilirubin calcium (39%) (a). The core of the bezoar was composed of bilirubin calcium (48%), calcium carbonate (36%), and fatty acid calcium (16%) (b).

(a)

(b)