Minimally invasive surgery “percutaneous nephrolithotomy” to benefit children with kidney stones? Huanhuan (a pseudonym), a 6-year-old boy from Yangshan, weighing only about 20 kg, was already a serious kidney stone patient, and the stone had caused obstructive hydronephrosis in the kidney. Recently, the Department of Urology of our hospital successfully performed a novel minimally invasive surgery for him – percutaneous nephrolithotomy. During the operation, the surgeon ultrasound positioned a small hole of 6 mm in diameter in Huanhuan’s waist, placed a guidewire into the urine-producing area of the kidney, and introduced a probe to crush and remove the oval-shaped stone of about 2 cm in diameter along the tube that expanded into a suction tube. The attending surgeon, Dr. Zhao Yan, attending physician of the Department of Urology, introduced that many children have kidney stones due to congenital metabolic abnormalities and other reasons. To remove such stones, traditional open surgery is very traumatic, and adults are usually left with scars of about 20 cm in the abdomen. Even when operating on young children, the incision has to accommodate the doctor’s hand to pass through and it takes at least 10 days before they can be discharged from the hospital. Huanhuan recovered well from the surgery, had her lumbar drainage tube removed and was playing in bed by 4 days, and was discharged from the hospital by 5 days.