Calcium phosphate urolithiasis and renal dysplasia in a young dog.

Calcium phosphate urolithiasis and bilateral renal dysplasia was diagnosed in an 8-week-old Border Terrier with a history of urine dribbling, which had been observed from the time of birth. Most reported cases of calcium phosphate urolithiasis are secondary to hypercalcemic disorders, but this was not detected. In addition, despite renal dysplasia, there was no evidence of renal failure. After cystotomy and calculus removal, the dog has remained clinically normal.