Abstract
Concurrent hyperthermic intraperitoneal chemotherapy and intraoperative radiotherapy with cytoreductive surgery in patients with rectal cancer with peritoneal carcinomatosis.
Author
person
Tarek Arabi
Alfaisal University College of Medicine, Riyadh, Saudi Arabia
info_outline
Tarek Arabi, Marwan Alaswad, Belal Nedal Sabbah, Abdullah Al Otry, Alwalid Hejazi, Aya Ismail, Heba Jaamour, Ziad Alhosainy, Samar Al Homoud, Ayman Azzam, Tarek Amin
Full text
Authors
person
Tarek Arabi
Alfaisal University College of Medicine, Riyadh, Saudi Arabia
info_outline
Tarek Arabi, Marwan Alaswad, Belal Nedal Sabbah, Abdullah Al Otry, Alwalid Hejazi, Aya Ismail, Heba Jaamour, Ziad Alhosainy, Samar Al Homoud, Ayman Azzam, Tarek Amin
Organizations
Alfaisal University College of Medicine, Riyadh, Saudi Arabia, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
Abstract Disclosures
Research Funding
No funding sources reported
Background:
Rectal cancer (RC) is often associated with peritoneal carcinomatosis (PC). Hyperthermic intraperitoneal chemotherapy (HIPEC) and intraoperative radiotherapy (IORT) have been shows to reduce recurrence and effectively treat PC across several cancers. However, little evidence is available regarding the concurrent use of HIPEC and IORT alongside cytoreductive surgery (CRS) in the literature.
Methods:
We retrospectively reviewed the medical records of RC patients with PC who received HIPEC plus IORT during CRS at the King Faisal Specialist Hospital and Research Centre. Demographic data, PC index (PCI), completeness of cytoreduction (CC), and tumor staging were collected. Overall survival (OS) was calculated from the time of surgery until death or last follow-up. Recurrence-free survival (RFS) was calculated from the time of surgery until recurrence or last follow-up. Unadjusted hazard ratios (HR) were used to determine the impact of parameters on OS or RFS.
Results:
17 patients were included in our analysis. Basic demographic data can be found in Table 1. The most common operation performed was rectosigmoid resection in 7 (41.2%) patients, followed by low anterior resection in 6 (35.3%). The pT stage was T0 in 1 (5.9%), T4a in 7 (41.2%), and T4b in 9 (52.9%). The pN stage was N0 in 11 (64.7%), N1a in 1 (5.9%), N1b in 2 (11.8%), N1c in 2 (11.8%), and N2b in 1 (5.9%). There was positive resection margin in 2 patients. The PCI was ≤6 in 15 (88.2%), and the CC score was 0-1 in all patients. No patients had intraoperative complications. 12 (70.6%) received mitomycin C, 4 (23.5%) received cisplatin and mitomycin C, and one patient received a reduced dose of mitomycin C due to old age. 2 (11.8%) patients received two doses of IORT. 11 (64.7%) patients had postoperative complications, of which all were Clavein-Dindo grades 1-3b. Recurrence occurred in 11 (64.7%). The median OS was not reached, and the median RFS was 12 months. There were no parameters associated with OS. Male gender (HR: 7.7, 95% CI: 1.4-57.3), pM1 (HR: 4.5, 95% CI; 1.2-18.1), and perineural invasion (HR: 6.5, 95% CI: 1.2-49.3) were associated with poor RFS in univariate analysis.
Conclusions:
Incorporating HIPEC and IORT into CRS may be an effective treatment strategy for RC patients. Presence of distant metastasis and perineural invasion can be predictors of rapid recurrence.
Parameter
N (%)/Mean±SD
Age
47.1±11.6
Male
5 (29.4%)
T4 stage
16 (94.1%)
N0 stage
11 (64.7%)
M0 stage
10 (58.8%)
Preoperative radiotherapy
8 (47.1%)
Preoperative chemotherapy
17 (100%)
Lymphovascular invasion
5 (29.4%)
Perineural invasion
5 (29.4%)
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