Case Report

A Calcium Enterolith in a Patient with Crohn’s Disease and Its In Vitro Dissolubility in Citric Acid

Figure 3

Photographs of the enterolith pieces. A piece before immersing in double distilled water (a) and a piece before immersing in 2% citric acid solution (b). After 120 hours of immersion and 30 minutes of air-drying, the color of the enterolith piece immersed in citric acid solution turned to black and appeared to have shrunken (d), compared with the piece immersed in water (c).