- A 50-year-old man presented with a large urinoma (accumulation of extravasated urine) on the right side of his abdomen following a grade IV blunt renal trauma 1.5 months prior. - CT scan showed a large multi-septated urinoma measuring 20x20cm near the site of the previous renal injury. - In surgery, a capsule containing 3 liters of fluid was incised and drained through a retroperitoneal incision, treating the urinoma. Urinomas form when extravasated urine becomes encapsulated by fibrous tissue over time if not drained.

1. NGUYEN QUOC BAO MD
NGUYEN QUOC BAO MD
DEPARTMENT OF UROLOGY– CHO RAY HOSPITAL
WEEKLY MEDICAL TOPICS
+84 973751527
nqbao.y14@ump.edu.vn NGUYEN QUOC BAO MD
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2. 1. CASE REPORT
• Male, 50 years old, worker, Binh Phuoc
• Admitted to ED with right flank pain
• Signs and symtems:
- 1.5 months, Dx: Right AAST grade IV blunt renal trauma with
extravasted urine conservative treatment
- During 10 days recently, presented with severe right flank pain,
progressive tenderness mass on the right side of the aldomen,
- No fever, yellow urine 2000ml/day
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3. • On examination:
- Normal vital sign
- Tenderness on the right side of the aldomen, a soft mass 15x20 cm
was papated
• Hx: no renal disease, no prior operative, no significant disease before
this renal trauma
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4. • Blood count revealed high level WBC ( 14.5 G/L)
• Normal renal function
• CTscan showed a large multi thin septa urinoma, 20x20cm, and renal
pelvis injury is suspected. Right AAST IV grade renal trauma
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7. Treatment
• The mass was explored and a capsule contained 3 litres of fluid was
incised and drained through an retroperitoneal incision
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DISCUSSION

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11. WHAT IS URINOMA ?
• A urinoma is an accumulation of extravasated urine which becomes
encapsulated by a very thick fibrous wall to form a mass (Pyrah and
Smiddy, 1953)
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PYRAH LN, SMIDDY FG. Pararenal pseudo-hydronephrosis; a report of two cases. Br J Urol. 1953

12. 11
1. Peterson NE. Complications of renal trauma. Urol Clin North Srinath, et al Am 1989; 16: 221-9.
2. Banowsky LH, Wolfel DA, Lackner LR. Considerations in diagnosis and management of renal trauma. J
Trauma 1970; 10: 587-91
3. Gomez RG, McAninch JW. In : McAninch JW, Caarrol PR, Jordon GR, editors. Traumatic and reconstructive
urology, Ist edition, Philadelphia: WB Saunders Co. 1996: 135-48.

13. DIAGNOSIS
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14. MANAGEMENT
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