title: Efficacy of Early Postoperative Intraperitoneal Chemotherapy After Complete Surgical Resection of Peritoneal Metastasis from Colorectal Cancer: A Case-Control Study from a Single Center.
abstract: Early postoperative intraperitoneal chemotherapy (EPIC) is a type of intraperitoneal chemotherapy for patients with colorectal cancer and peritoneal metastasis. However, there is a paucity of clinical studies evaluating the efficacy of EPIC after complete cytoreductive surgery. This study was designed to evaluate the efficacy of EPIC in patients who underwent complete surgical resection of peritoneal metastasis from colorectal cancer.
  
  
  
  A 1:2 matched case-control study was conducted in patients undergoing complete surgical resection of peritoneal metastases from colorectal cancer at our institution between January 2000 and November 2013. The operative and survival outcomes of patients receiving EPIC (EPIC group) and those who did not (no EPIC group) were compared.
  
  
  
  Thirty patients who were treated with EPIC were matched with 15 patients who did not receive EPIC. The 3-year overall survival (OS) and disease-free survival (DFS) were 74.3 and 53.0 % in the EPIC group and 34.7 and 7.5 % in the no EPIC group (EPIC group vs. no EPIC group: OS, P = 0.016; DFS, P = 0.002). Multivariate analysis identified EPIC and adjuvant systemic chemotherapy as independent prognostic factors for OS, whereas only EPIC was prognostic factor for DFS. For peritoneal-DFS, EPIC was the only significant variable in the univariate analysis (hazard ratio, 2.70; 95 % confidence interval 1.17-6.21; P = 0.020).
  
  
  
  EPIC is a safe and efficacious option for intraperitoneal chemotherapy to prevent peritoneal recurrence and prolong survival after complete resection of peritoneal metastasis from colorectal cancer.
authors.affiliation: Colorectal Cancer Center, Kyungpook National University Medical Center, School of Medicine, Kyungpook National University, Daegu, Korea.
authors.forename: Soo Yeun
authors.initials: SY
authors.lastname: Park
authors.affiliation: Colorectal Cancer Center, Kyungpook National University Medical Center, School of Medicine, Kyungpook National University, Daegu, Korea. kyuschoi@mail.knu.ac.kr.
authors.forename: Gyu-Seog
authors.initials: GS
authors.lastname: Choi
authors.affiliation: Colorectal Cancer Center, Kyungpook National University Medical Center, School of Medicine, Kyungpook National University, Daegu, Korea.
authors.forename: Jun Seok
authors.initials: JS
authors.lastname: Park
authors.affiliation: Colorectal Cancer Center, Kyungpook National University Medical Center, School of Medicine, Kyungpook National University, Daegu, Korea.
authors.forename: Hye Jin
authors.initials: HJ
authors.lastname: Kim
authors.affiliation: Colorectal Cancer Center, Kyungpook National University Medical Center, School of Medicine, Kyungpook National University, Daegu, Korea.
authors.forename: Chun-Seok
authors.initials: CS
authors.lastname: Yang
authors.affiliation: Department of Hematology/Oncology, Kyungpook National University Medical Center, School of Medicine, Kyungpook National University, Daegu, Korea.
authors.forename: Jong Gwang
authors.initials: JG
authors.lastname: Kim
authors.affiliation: Department of Hematology/Oncology, Kyungpook National University Medical Center, School of Medicine, Kyungpook National University, Daegu, Korea.
authors.forename: Byung Woog
authors.initials: BW
authors.lastname: Kang
mesh_terms: D000230:Adenocarcinoma / Q000188:drug therapy* / Q000556:secondary / Q000601:surgery; D000328:Adult; D000368:Aged; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use*; D018279:Carcinoma, Signet Ring Cell / Q000188:drug therapy* / Q000556:secondary / Q000601:surgery; D016022:Case-Control Studies; D017024:Chemotherapy, Adjuvant; D010478:Chemotherapy, Cancer, Regional Perfusion / Q000401:mortality*; D015179:Colorectal Neoplasms / Q000188:drug therapy* / Q000473:pathology / Q000601:surgery; D003131:Combined Modality Therapy; D065426:Cytoreduction Surgical Procedures / Q000401:mortality*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D010534:Peritoneal Neoplasms / Q000188:drug therapy* / Q000556:secondary / Q000601:surgery; D011184:Postoperative Period; D011379:Prognosis; D015996:Survival Rate