Abstract
Background
Cytoreductive surgery (CRS) and hyperthermic intraperitoneal chemotherapy (HIPEC) used to treat peritoneal surface disease (PSD) from appendiceal cancer have shown variability in survival outcomes. The primary goal of this study was to determine predictors of surgical morbidity and overall survival. The secondary goal was to describe the impact of nodal status on survival after CRS/HIPEC for PSD from low-grade appendiceal (LGA) and high-grade appendiceal (HGA) primary lesions.
Methods
A retrospective analysis of 1,069 procedures from a prospective database was performed. Patient characteristics, tumor grade, nodal status, performance status, resection status, morbidity, mortality, and survival were reviewed.
Results
The study identified 481 CRS/HIPEC procedures: 317 (77.3 %) for LGA and 93 (22.7 %) for HGA lesions. The median follow-up period was 44.4 months, and the 30-day major morbidity and mortality rates were respectively 27.8 and 2.7 %. Major morbidity was jointly predicted by incomplete cytoreduction (p = 0.0037), involved nodes (p < 0.0001), and comorbidities (p = 0.003). Multivariate negative predictors of survival included positive nodal status (p = 0.003), incomplete cytoreduction (p < 0.0001), and preoperative chemotherapy (p = 0.04) in LGA patients and incomplete cytoreduction (p = 0.0003) and preoperative chemotherapy (p = 0.0064) in HGA patients. After complete cytoreduction, median survival was worse for patients with positive nodes than for those with negative nodes in LGA (85 months vs not reached [82 % alive at 90 months]; p = 0.002) and HGA (30 vs 153 months; p < 0.0001).
Conclusions
Positive nodes are associated with decreased survival not only for HGA patients but also for LGA patients even after complete cytoreduction. Nodal status further stratifies histologic grade as a prognostic indicator of survival. Patients with node-negative HGA primary lesions who receive a complete cytoreduction may experience survival comparable with that for LGA patients.
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Acknowledgment
This study was supported by Wake Forest University Biostatistics shared resource NCI CCSG P30CA012197.
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Votanopoulos, K.I., Russell, G., Randle, R.W. et al. Peritoneal Surface Disease (PSD) from Appendiceal Cancer Treated with Cytoreductive Surgery (CRS) and Hyperthermic Intraperitoneal Chemotherapy (HIPEC): Overview of 481 Cases. Ann Surg Oncol 22, 1274–1279 (2015). https://doi.org/10.1245/s10434-014-4147-y
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DOI: https://doi.org/10.1245/s10434-014-4147-y