A 53 year-old male patient with a painless big abdomen was accidentally detected having a right giant hydronephrosis via ultrasound examination.
Later, MSCT confirmed easier than ultrasound the 20 mm right ureteral stone which caused the right giant hydronephrosis.
The patient went through a right nephrostomy in emergency situation. About 4.5 liters of urine was drained out and then his abdomen getting flatten.
Two weeks later was done an evaluation of the right kidney function via Tc-99m DTPA scan. Ultrasound re-examination noted a distortion of right kidney structure: thickness of renal cortex thinner than 6 millimeter and nonexistent differentiation of renal medulla from cortex of renal parenchyma.