Clinical Scorecard: Preliminary Results of Transperineal Minimally Invasive Abdominoperineal Excision in a Multicenter Study
At a Glance
Category
Detail
Condition
Locally advanced low rectal cancer
Key Mechanisms
Transperineal minimally invasive abdominoperineal excision (TpAPE) combining laparoscopic abdominal and endoscopic perineal dissection to achieve oncological resection with reduced morbidity
Target Population
Patients with low rectal cancer requiring abdominoperineal excision including unilateral or bilateral extralevator APE
Care Setting
Multicenter expert colorectal surgery centers with laparoscopic and minimally invasive capabilities
Key Highlights
TpAPE aims to improve oncological outcomes by avoiding coning and achieving wider distal margins through minimally invasive transperineal dissection.
The technique involves simultaneous abdominal laparoscopic mobilization and endoscopic perineal dissection using single port devices and standard laparoscopic instruments.
Perineal wound healing remains a challenge, especially in irradiated patients, with options for primary closure, gluteal turnover flaps, or biological mesh reconstruction.
Guideline-Based Recommendations
Diagnosis
Assessment of low rectal cancer with threatened margins requiring abdominoperineal excision.
Preoperative imaging to evaluate tumor location and involvement of mesorectal fat and pelvic floor.
Management
Perform TpAPE with combined laparoscopic abdominal and transperineal endoscopic approach in lithotomy position.
Use purse string closure of anus followed by radial perineal incision and single port insertion for perineal dissection.
Tailor extent of pelvic floor excision (standard APE, unilateral or bilateral ELAPE) based on tumor involvement.
Close perineal defect primarily or with flap/mesh reconstruction depending on defect size and patient factors.
Monitoring & Follow-up
Monitor intraoperative complications to assess feasibility of TpAPE technique.
Evaluate 30-day postoperative morbidity including Clavien-Dindo grade ≥3 complications.
Assess perineal wound healing and manage complications promptly.
Risks
Higher risk of involved circumferential resection margin (CRM) with standard APE compared to anterior resection.
Potential for perineal wound healing problems, especially in irradiated patients.
Risk of specimen perforation and coning if dissection planes are not properly maintained.
Patient & Prescribing Data
Patients undergoing abdominoperineal excision for low rectal cancer, including those with locally advanced tumors requiring extralevator excision.
TpAPE is feasible with acceptable intraoperative complication rates and may improve histopathological outcomes by reducing CRM involvement; however, perineal wound morbidity remains a concern.
Clinical Best Practices
Ensure meticulous total mesorectal excision principles to avoid CRM involvement.
Use simultaneous abdominal and perineal minimally invasive approaches to optimize visualization and dissection.
Identify correct anterior dissection plane posterior to transverse perineal muscles to avoid tumor coning.
Tailor pelvic floor resection extent based on tumor location and involvement.
Consider reconstructive options for perineal defect closure to reduce wound complications.
Monitor patients closely postoperatively for major morbidity and wound healing issues.
