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Incidence, Risk Factors, and Outcomes from Conversion of Low-Grade to High-Grade Appendiceal Neoplasms for Patients Undergoing Multiple Cytoreductive Surgeries with Hyperthermic Intraperitoneal Chemotherapy

  • Peritoneal Surface Malignancy
  • Published:
Annals of Surgical Oncology Aims and scope Submit manuscript

Abstract

Introduction

Conversion from low-grade to high-grade disease is known to occur following repeat cytoreductive surgery and hyperthermic intraperitoneal chemotherapy (CRS/HIPEC); however, the incidence rate, risk factors, and outcomes have not been studied.

Methods

We conducted a retrospective review of multiple CRS/HIPEC cases for patients originally diagnosed with low-grade appendiceal neoplasms, and compared converted cases with non-converters. Primary outcomes were the incidence rate and risk factors for conversion, while secondary outcomes were effect on cytoreduction, overall survival (OS), and disease-free survival (DFS).

Results

Overall, 65 patients undergoing 134 cases of repeat CRS/HIPEC were identified; 11 patients converted to high-grade disease, an incidence rate of 16.92%. Converted cases averaged 4.4 years between CRS/HIPEC, versus 3.7 years for non-converters. Elevated baseline carcinoembryonic antigen (CEA) level, splenectomy at index CRS/HIPEC, and adjuvant chemotherapy utilization were statistically significant with conversion. Conversion had no impact on specific cytoreductive scores at repeat CRS/HIPEC (p = 0.435). Evaluating the effect on OS from the index CRS/HIPEC conversion had no impact. Mean OS was 9.5 and 8.8 years for cases that remained low-grade compared with those that converted, respectively (p = 0.668); however, when comparing OS from the time of conversion at repeat CRS/HIPEC, patients who progressed to high-grade disease had decreased survival at 4.4 versus 5.8 years (p = 0.0317). There was no difference in DFS between non-converters and converters at 4.1 and 3.6 years, respectively (p = 0.671).

Conclusion

Conversion had no impact on OS from the index CRS/HIPEC but resulted in inferior survival from repeat surgery. Conversion was insignificant in regard to DFS, and should not be considered a contraindication to repeat CRS/HIPEC. Adjuvant chemotherapy should be avoided.

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Authors and Affiliations

  1. Division of Surgical Oncology, Wake Forest Baptist Health Medical Center, Winston-Salem, NC, USA

    Christopher W. Mangieri MD, Cristian D. Valenzuela MD, Richard A. Erali MD, Konstantinos I. Votanopoulos MD, PhD, Perry Shen MD & Edward A. Levine MD

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  1. Christopher W. Mangieri MD
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  2. Cristian D. Valenzuela MD
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  3. Richard A. Erali MD
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  4. Konstantinos I. Votanopoulos MD, PhD
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  6. Edward A. Levine MD
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Correspondence to Christopher W. Mangieri MD.

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Mangieri, C.W., Valenzuela, C.D., Erali, R.A. et al. Incidence, Risk Factors, and Outcomes from Conversion of Low-Grade to High-Grade Appendiceal Neoplasms for Patients Undergoing Multiple Cytoreductive Surgeries with Hyperthermic Intraperitoneal Chemotherapy. Ann Surg Oncol 29, 205–211 (2022). https://doi.org/10.1245/s10434-021-10660-4

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