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

Figure 5

Electron microscopy images. The cut surface of the bezoar showed acicular crystals (a). Multiple globular substances were observed only in the bezoar core (b). Elemental mapping showed a large amount of calcium deposition in the globular substances (c). The common bile duct stones also showed acicular crystals (d). However, the width and length of these stones were greater than those of the bezoar. Crystals were not observed in the commercially available bilirubin powder (e).

(a)

(b)

(c)

(d)

(e)