The most common indication for retroperitoneoscopy in children is poorly functioning kidney, related to reflux or obstruction. Few pediatric urologists attempt to conduct a mass resection operation under retroperitoneoscopy, especially in infants with oncological diseases. In this study, we describe our experience in a series of resection operations under retroperitoneoscopy to demonstrate its safety and efficacy in children, especially in the treatment of pediatric urology tumor. A retrospective review of 18 consecutive retroperitoneoscopic resection operations from December 2017 to July 2019 was made. Then a comparison study between retroperitoneoscopy and transperitoneal laparoscopy for exclusively oncological patients was conducted. Retroperitoneoscopic surgery was successfully performed on 18 patients, 11 having solid tumors, 2 with cysts, and 5 with nonfunctioning or poorly functioning kidneys. The mean age was 69.5 ±46.9 months. The mean operative time was 138.6 ±57.7 min, while the mean size ocommended surgical approach for children. Sialoliths can be removed by sialendoscopy in some cases. But sometimes it fails if the stone is located in the proximal or hilum of Wharton's duct. To evaluate the clinical efficacy of the sialendoscopy-assisted intraoral incision approach to remove large stones located in the proximal or hilum of Wharton's duct, when sialendoscopy alone fails. Twenty patients with large stones located in the proximal or hilum of Wharton's duct were included in our study. We used a sialendoscopy-assisted intraoral incision approach to remove large stones located in the proximal or hilum of Wharton's duct when endoscopy failed. The complications and treatment effect were observed. The stones were removed successfully in this way in all patients. Two cases had tongue numbness after the operation, and recovered 3 months later without additional intervention. No swelling or pain appeared during the 3-month to 1-year follow-up. Saliva could be observed from the orifice in 15 patients, with little or none in 5 patients. The sialendoscopy-assisted intraoral incision approach to remove large stones located in the proximal or hilum of Wharton's duct is effective and safe.The sialendoscopy-assisted intraoral incision approach to remove large stones located in the proximal or hilum of Wharton's duct is effective and safe. Caesarean scar pregnancy (CSP) is a relatively rare yet life-threatening condition in which the embryo is implanted in the scar after caesarean section. Recent studies have reported that uterine artery chemoembolisation (UAC) can be safe and effective method in treating CSP. To present the clinical outcome of UAC with a mixture of methotrexate and gelatine sponge for the treatment of CSP and analysis of procedural failure. Forty-one patients diagnosed with CSP were treated with selective endovascular chemoembolisation of uterine arteries. Short- and long-term results, reasons for procedural failure, and clinical outcome were analysed. Primary procedure failed in 7 out of 41 (17%) cases. In 4 cases additional blood supply to the CSP was disclosed; 3 out of 4 from an ovarian artery and one from a superior vesical artery. In other 3 patients, reperfusion of uterine arteries was observed. All these 7 patients underwent successful secondary embolisation. The majority of the followed-up patients reported regular menses after the intervention. Four women suffered from amenorrhoea and 2 from hypomenorrhoea that continued after 90 days. Twelve patients expressed the desire for subsequent pregnancy. From this group, 5 conceived within a year of the procedure. The rest did not achieve a pregnancy. UAC proved to be a safe and effective method and should be considered as an option for CSP treatment, especially for women hoping to preserve their fertility. However, the presence of collateral blood supply should always be considered.UAC proved to be a safe and effective method and should be considered as an option for CSP treatment, especially for women hoping to preserve their fertility. However, the presence of collateral blood supply should always be considered. Natural orifice transluminal endoscopic surgery (NOTES) is a new concept of minimally invasive surgery. It could prevent complications related to the trocar in laparoscopic surgery, and help achieve ideal cosmetic outcomes. To describe the safety and feasibility of the prone position in transvaginal NOTES (V-NOTES) resection of posterior uterine myoma. Seventeen patients were included in the study from February to December 2019. All the patients were diagnosed with solitary posterior uterine myoma and underwent V-NOTES myomectomy in the prone position. We measured the characteristics and the surgical outcomes of these patients, to evaluate the safety and feasibility of the prone position in V-NOTES myomectomy. The mean age of the patients was 38.71 ±7.68 years and the mean body mass index was 22 ±2.02 kg/m . Five patients had a cesarean section once, and 1 patient had a history of two operations (cesarean section and laparoscopic cholecystectomy). The remaining patients had no history of surgery. Bleomycin The mean myoma volume in the ultrasound report was 121.99 ±125.24 cm . The mean operation time was 107.48 ±34.16 min. The mean hemoglobin decrease 48 h after the operation was 1.37 ±0.66 g/dl. The mean weight of the myoma was 183.88 ±144.29 g. The mean VAS score 12 h and 24 h after surgery was 2 ±0.87 and 1.18 ±0.73, respectively. The mean postoperative hospital stay was 3.18 ±0.39 days. One patient was converted to TU-LESS. No other complications such as massive hemorrhage, infection or injury occurred. The prone position in V-NOTES myomectomy is safe and feasible. It expands the operative space and reduces the difficulty of surgery. Perhaps it can be used as a standard position for posterior uterine myomectomy by V-NOTES.The prone position in V-NOTES myomectomy is safe and feasible. It expands the operative space and reduces the difficulty of surgery. Perhaps it can be used as a standard position for posterior uterine myomectomy by V-NOTES.