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Updated: Feb 20, 2026

Estimation of Urinary Nanocrystals in Humans using Calcium Fluorophore Labeling and Nanoparticle Tracking Analysis
Published on: February 9, 2021
Ectopic Bone as a Nidus for Calcium Oxalate Urocystolithiasis in a Cat
J P Lulich1, H S Prasad2, M Manno3
1Veterinary Clinical Sciences, College of Veterinary Medicine, University of Minnesota, Minneapolis, MN.
Abstract:
A 7-year-old female spayed domestic shorthair cat was referred to the urology service for nonsurgical urocystolith removal. A urolith was attached to the urothelium by ectopic bone. Interventional removal without surgery was successful. Follow-up evaluation 3 years after urolith removal revealed recurrent uroliths, bladder wall mineralization, and marked renal mineralization. This case illustrates the metaplastic potential of the urothelium and that ectopic bone should be included among the pathological factors that promote lithogenesis.
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