The 11-year-old Hainan boy Qiangzai (a pseudonym) daily back pain, urination difficulties, repeated infections and fever, the right kidney removed after the condition has not seen improvement. This reporter learned yesterday from the Second People’s Hospital of Guangdong Province, the “culprit” of Qiang Chai’s condition turned out to be two rare congenital malformations of the ureter and bladder. The ureter is as thick as a small intestine tube In November last year, Johnnie came home from school and suddenly told his parents that he had “back pain”. When the parents asked, they realized that Qiang was not only suffering from back pain, but also from fever, and his urine was cloudy when he urinated, so they rushed him to the local hospital, where he was examined for severe hydrocele in his right kidney. According to Dr. Yang Guosheng, director of the Department of Urology at Guangdong Second People’s Hospital, the CT showed that the right kidney had been removed along with most of the right ureter, but the small section of the ureter connecting to the bladder was significantly dilated, about 3 to 4 cm in diameter and as thick as a small intestinal tube. The entire bladder was divided into three chambers by two diaphragms near the right ureter. This is the real cause of Johnnie’s hydronephrosis. Experts warned that children need to be alert to the soreness and pain on one side of the waist Yang Guosheng said, for example, that the bladder is like a pond, the ureter is equivalent to a channel that floods the pond, and the bladder diaphragm is equivalent to the “valve” that controls the flow of water between the channel and the pond, while abnormal diaphragms inside the bladder like Qiang’s are like another small pond hidden inside the pond. As the “valve” is abnormal, the water inside the pond will flow back to the channel, thus causing hydronephrosis, and so on, infection will easily occur. After the root of the problem was found, the hospital immediately performed a right ureteral and bladder diaphragm removal and bladder reconstruction surgery to remove the remaining giant ureter on his right side, and at the same time, remove the abnormal diaphragm inside the bladder. He is currently recovering in the hospital and will be back in school in a short time. Yang Guosheng reminded that hydronephrosis in children is mostly caused by congenital anomalies. If a child has symptoms such as soreness and swelling of the lower back, especially on one side, be especially alert to the fact that this may be an early manifestation of hydronephrosis.