Figure 2From: Renal papillary calcification and the development of calcium oxalate monohydrate papillary renal calculi: a case series study Hydroxyapatite deposits (endoscopic images) of renal papillae from patients (a) 2, (b) 3, and (c) 4. A papillary calculus was present on the papillary tip in patient 3 (arrow), and a small papillary calculus was present at the lateral position in patient 4 (arrow).Back to article page