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Canine (Maltipoo) · Ultrasound — Abdomen

UltrasoundAbdomenLevel: Veterinarian

Species: Canine
Breed: Maltipoo
Age: 13 years
Sex: Female spayed
Weight: 5.5 kg
Level: Veterinarian

Presenting complaint and brief history

The patient presented for anorexia, vomiting, and acute-on-chronic kidney disease. Serum biochemistry revealed severe azotemia with markedly elevated creatinine and blood urea nitrogen.

Diagnosis

Hides the diagnosis, imaging findings, outcome, take-home points and correlation photos so you can read the images blind.

Left ureterolithiasis with hydronephrosis and renal atrophy

Highly suspected

Imaging findings

The left kidney is markedly small with markedrenal pelvic dilation and minimal remaining parenchyma. A shadowing calculus is present in the mid left ureter associated with proximal hydroureter and focal ureteral wall thickening.

Key take-home points

Marked renal pelvic dilation warrants careful tracking of the ureter downstream to identify obstructive calculi.
Hydronephrosis indicates an obstructive process, whereas pyelectasia typically denotes functional or non-obstructive renal pelvic widening.

Some fields on this case were drafted with AI assistance from the contributor's own report or dictation, then reviewed by the contributor and by a reviewer before publication. How we use AI.

Contributed by

Oren Ofer
DVM, DVSc, DACVR
49 cases

Educational use only — not clinical advice.

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Cite this case

Ofer O. Left ureterolithiasis with hydronephrosis and renal atrophy. Radabase case dd47e517. Retrieved 2026-10-29 from https://www.radabase.vet/case/dd47e517-01f8-4934-9ee3-997a0b77ccc4

Also searched as: ureteral stone, ureteric calculus, ureterolith, ureteral calculi, ureter stone, obstructing ureteral stone, hydronephrosis, renal pelvic dilation, renal pelvic dilatation, hydroureter, renal atrophy, atrophic kidney, shrunken kidney, renal parenchymal thinning

Discussion

Questions and observations from colleagues. Never post identifying patient or owner information.

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