title: High preoperative serum ferritin predicted poor prognosis in non-metastatic colorectal cancer.
abstract: To validate the prognostic significance of preoperative serum iron metabolism parameters in non-metastatic colorectal cancer patients treated with curative resection.   Methods: We conducted a prospective cohort study in the Department of Surgical Oncology, WuXi 4th People's Hospital, WuxiChina, between  March 2010 and September 2013.  The relationships of serum iron metabolism parameters with other variables were examined. The prognostic significance was evaluated using the Kaplan Meier curve and Cox proportional hazards regression model.  Results: Five hundred and fourteen patients were eligible for analysis. The levels of the 3 iron metabolism parameters were interdependent. Hemoglobin level was positively correlated with serum iron and transferrin, and was negatively correlated with ferritin. Compared with peri-neural invasion (PNI)-negative patients, PNI-positive patients had higher serum iron (p=0.03) and ferritin levels (p=0.01). Compared with patients with the lowest quartile level of ferritin, patients with the highest quartile level of ferritin had a 2.21 (95% CI: 1.18-4.14) fold increased mortality risk in the univariate and 2.56 (95% CI: 1.10-5.96) in the multivariate Cox proportional hazards models. When stratified by TNM stages, it was only in stage III patients that serum ferritin remained statistically prognostically significant. Conclusions: Preoperative serum ferritin appeared as an independent adverse risk factor in non-metastatic colorectal cancer.
authors.affiliation: Department of Medical Oncology, The Second Affiliated Hospital of Soochow University, Suzhou, People Republic of China. E-mail. 553273569@22.com.
authors.forename: Hong
authors.initials: H
authors.lastname: Tingting
authors.forename: Shen
authors.initials: S
authors.lastname: Di
authors.forename: Chen
authors.initials: C
authors.lastname: Xiaoping
authors.forename: Wu
authors.initials: W
authors.lastname: Xiaohong
authors.forename: Hua
authors.initials: H
authors.lastname: Dong
mesh_terms: D000368:Aged; D015331:Cohort Studies; D015179:Colorectal Neoplasms / Q000097:blood* / Q000401:mortality / Q000473:pathology / Q000601:surgery; D013505:Digestive System Surgical Procedures; D005260:Female; D005293:Ferritins / Q000097:blood*; D006801:Humans; D007501:Iron / Q000097:blood*; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009361:Neoplasm Invasiveness; D009367:Neoplasm Staging; D057234:Preoperative Period; D016016:Proportional Hazards Models; D011446:Prospective Studies; D014168:Transferrin / Q000378:metabolism*
chemical_list: D014168:Transferrin; D005293:Ferritins; D007501:Iron