A ten year old male castrated Shih Tzu presented for surgical correction for a previously diagnosed urolithiais. Radiographs identified radiopaque urolithiasis with cystic and urethral involvement. Surgical correction was elected, and cystotomy with retrograde hydropropulsion was performed. During surgery, polypoid projections were detected on the bladder mucosa, and these were removed and submitted for histopathology. Post-operative radiographs confirmed successful removal of all uroliths, and the patient recovered uneventfully. Post operative diagnostic test results revealed the urolothiasis to be composed of calcium oxalate stones, and the bladder wall histopathology revealed a polypoid cystitis. Medical management was implemented, and there has been no evidence of urolithiasis recurrence to date.