case_images: PMC4996579_01
case_images: CT scan demonstrating bilateral hydroureteronephrosis, perinephric stranding and bilateral obstructing ureteral stones.
case_images: fig-1.jpg
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case_images: f1
case_images: A CT noncontrast scan of the abdomen and pelvis demonstrated mildly atrophic kidneys with bilateral hydroureteronephrosis, perinephric fat stranding, and suggestion of right forniceal rupture (Fig. 1).
case_images: Gross appearance of the stones.
case_images: fig-2.jpg
case_images: PMC4996579_01_fig-2.jpg
case_images: f2
case_images: The gross appearance of the intact stones is demonstrated in Figure 2.
case_images: FTIR analysis results. FTIR, Fourier transform infrared spectroscopy.
case_images: fig-3.jpg
case_images: PMC4996579_01_fig-3.jpg
case_images: f3
case_images: Aldrich Chemical HR FTIR Collection Series II (spectra #17943) was at the 96.1% level (Fig. 3). Additionally, a basic calcium phosphate crystal component was identified and appeared as a white powder within and on the surface of the stone sample.
case_images: (A) ConvaTec appliance. (B) The surface in contact with the patient's skin that was confirmed with FTIR to contain polyisobutylene.
case_images: fig-4.jpg
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case_images: f4
case_images: Two specific areas (Fig. 4) of the Natura  ostomy appliance were characterized by FTIR and the composition of the adhesive side of the appliance matched with PIB (Fig. 4B).