Fig. 1

The main results for the examinations in the patient. Note: The kidney ultrasound revealed the presence of ascites and the absence of hydronephrosis in emergency room (A). Further contrasted computed tomography scan confirmed no hydronephrosis (B) and the presence of urine in the bladder (C). The methylene blue test conducted on the day of catheter placement yielded positive results (D). Arranged from left to right, the fluids exhibited the colors blue (methylene blue solution), yellow (ascitic fluid before the test), light green (ascitic fluid one hour after the test), and green (ascitic fluid two hours after the test), respectively. Subsequent to three days of indwelling Foley catheterization, a contrast-enhanced fluid containing a radiopaque agent was infused into the bladder via the catheter, and cystography examination revealed no evidence of leakage (E)