Validation of Core Data Set for Empty Pelvis Syndrome Post-Pelvic Exenteration
Overview
Empty pelvis syndrome (EPS) occurs in approximately one-third of pelvic exenteration (PE) patients and is a leading cause of major morbidity. This study validates the PelvEx Collaborative core data set, demonstrating associations between EPS manifestations and surgical factors, and highlights reconstruction strategies impacting morbidity.
Background
Pelvic exenteration is a radical surgical treatment for advanced pelvic cancers but can result in empty pelvis syndrome, a complex of complications including pelvic sepsis, fistulae, and bowel obstruction. Historically, inconsistent reporting of EPS has hindered research and clinical understanding. The PelvEx Collaborative developed a standardized core data set to uniformly describe EPS manifestations and descriptors, aiming to improve research quality and patient outcomes.
Data Highlights
Parameter
Value
EPS incidence
32.1% (105/327 patients)
Infected pelvic collections
23.5%
Odds ratio (OR) for chronic sinus formation with infected collections
3.08 (P = 0.01)
OR for EPS with external beam radiotherapy
1.01 per 1 Gy (P = 0.01)
OR for EPS with sacrectomy
3.78 (P < 0.001)
OR for EPS with total cystectomy
2.46 (P = 0.001)
OR for EPS with unilateral internal iliac vessel ligation
1.94 (P = 0.045)
OR for EPS with bilateral internal iliac vessel ligation
3.65 (P < 0.001)
OR for EPS with infralevator exenteration
3.69 (P < 0.001)
Effect of omentoplasty on pelvic bowel obstruction
OR 0.27 (P = 0.004)
Reconstruction-related major morbidity: perineal flaps vs biological mesh
20.8% vs 1.2% (P = 0.002)
Key Findings
EPS occurred in 32.1% of patients undergoing pelvic exenteration and was the leading cause of major morbidity.
Infected pelvic collections significantly increased the risk of chronic sinus formation and fistula development.
Risk factors for EPS included external beam radiotherapy, sacrectomy, total cystectomy, internal iliac vessel ligation, and infralevator exenteration.
Omentoplasty was associated with a significant reduction in pelvic bowel obstruction risk.
Use of biological mesh for reconstruction was linked to substantially lower reconstruction-related major morbidity compared to perineal flaps.
The PelvEx Collaborative core data set effectively standardized EPS reporting and captured both acute and chronic complications.
Clinical Implications
Standardized use of the PelvEx Collaborative core data set can improve identification and reporting of EPS complications, facilitating better patient management and research. Surgical planning should consider the increased EPS risk associated with certain procedures and prior radiotherapy. Reconstruction using biological mesh may reduce morbidity compared to perineal flaps, and omentoplasty should be considered to lower bowel obstruction risk.
Conclusion
This study validates the PelvEx Collaborative core data set for EPS, confirming its utility in capturing key complications and risk factors after pelvic exenteration. Adoption of standardized descriptors and outcomes can enhance clinical care and research in this complex patient population.
References
PelvEx Collaborative 2024 -- Validation of a Core Data Set for Empty Pelvis Syndrome Following Pelvic Exenteration and Its Impact on Major Morbidity
by Charles T West, Abhinav Tiwari, Julian Smith, Hideaki Yano, Malcolm A West, Alex H Mirnezami, Southampton Complex Cancer and Exenteration Team, G Ansell, A Bateman, C Birch, L Borthwick, H Cheema, V Dawson, K Donovan, J Douglas, R Exton, B George, J Green, M Hayes, G Hodges, L Ingram, C Lane, R Lewis, T Nash, M Nicolaou, B Patterson, E Ryan, Y Salem, D Spencer, K Stoddard, P Tapley, L Wodd, R Zaher
