title: Papillary stones: calcified renal tubules in Randall's plaques.
abstract: Papillary stones are small, rounded concretions with one smooth convex face and one concave face which corresponds to its implantation on the papilla and in which a whitish Randall's plaque is often present. Eighty-seven papillary stones were studied with stereoscopic, scanning electron microscopic and x-ray dispersive energy analysis. Sixty-three stones had a plaque and 13 of these showed calcified renal tubules that demonstrated their intrapapillary origin and a link between partial papillary nephrocalcinosis and renal stones.
mesh_terms: D002114:Calcinosis / Q000473:pathology*; D002130:Calcium Phosphates / Q000378:metabolism*; D006801:Humans; D007669:Kidney Calculi / Q000378:metabolism / Q000473:pathology*; D007679:Kidney Medulla / Q000378:metabolism / Q000473:pathology*; D007681:Kidney Papillary Necrosis / Q000473:pathology; D007684:Kidney Tubules / Q000473:pathology*; D008855:Microscopy, Electron, Scanning
chemical_list: D002130:Calcium Phosphates; C485828:alpha-tricalcium phosphate; C485830:tetracalcium phosphate; C485838:calcium phosphate, monobasic, anhydrous; C020243:calcium phosphate; C485829:calcium phosphate, dibasic, anhydrous