[Standardized surgical procedure for natural orifice specimen extraction surgery of precision functional sphincter-preserving surgery for ultra-low rectal cancer (NOSES-PPS) (2024 edition)].

Natural orifice specimen extraction surgery of precision functional sphincter- preserving surgery for ultra-low rectal cancer (NOSES-PPS) is an innovative surgical technique that builds upon traditional laparoscopic surgery for low rectal cancer. This method utilizes a specially designed transparent screw-thread anal dilator and associated equipment to achieve precise tumor localization and resection through direct visualization via the anus. Digestive tract reconstruction is then accomplished using a combination of a precision circular stapler and manual suturing, thereby preserving sphincter function in patients with ultra-low rectal cancer. NOSES-PPS has been widely adopted across multiple provinces and cities in China, with over 500 cases successfully performed to date. The technique and its outcomes have been published in both national and international peer-reviewed journals, receiving significant recognition from the medical community. However, as a novel approach to rectal cancer surgery, there is currently a lack of authoritative clinical practice guidelines detailing the specific procedural steps of NOSES-PPS. To address this gap, the Colorectal Tumor Committee of the Chinese Medical Association, the Colorectal Cancer Committee of the Chinese Anti-cancer Association, and the China NOSES Collaborative Group have jointly led an effort to establish standardized guidelines for NOSES-PPS. This initiative involved the collaboration of experts in colorectal oncology from numerous large medical centers across China. Through multiple rounds of consultation and discussion, these experts have developed a comprehensive set of guidelines that detail the definition of NOSES-PPS, requirements for instrumentation, indications, key operative techniques, and the management of perioperative and postoperative complications. This guideline aims to promote the standardized implementation of NOSES-PPS in clinical practice.