Patient: Hello, specialist! I am the parent of Feng Wen, a patient with right isolated kidney and severe hydronephrosis, who was discharged from the hospital on January 26. The right ureter was not significantly dilated, and the upper segment was about 0.2 cm. The left kidney was 3.7×1.7 cm, with intact peritoneum and indistinct cortical display, and the collecting system was not significantly separated. The left ureter was not significantly dilated. The bladder was well filled and the internal translucency was acceptable. Suggestions: 1. severe hydronephrosis in the right kidney (consider stenosis of the pelvic-ureteral junction) 2. small volume of the left kidney. Now we are very anxious, please what should we do now? Thanks! Specialist: The fluid will gradually shrink after surgery. You have a severe hydronephrosis in the only kidney. We operated very carefully and clarified the cause of the high ureteral opening, and we are satisfied with the procedure and the result, so you can rest assured that although the fluid will accumulate for a lifetime, it will have no major impact on the child’s life. Patient: That’s good, I’m relieved now, thank you expert! Thank you!