Patient: Left-sided back pain for half a month Laboratory tests and ultrasound showed a 7*12mm stone in the second stenosis of the left ureter Whether it can be treated conservatively. Chen Rong, Department of Urology, Shanghai Sixth People’s Hospital: Hello! Based on your brief medical history, I cannot give you a complete answer yet. You can refer to the following information for further treatment. If the ultrasound indicates moderate to severe hydronephrosis, consider active ureteroscopic lithotripsy; if there is no hydronephrosis or mild hydronephrosis, shock wave lithotripsy can be performed.