title: Changes in disease pattern and treatment outcome of colorectal cancer: a review of 5,474 cases in 20 years.
abstract: OBJECTIVE
  Colorectal cancer (CRC) is the third most common cause of cancer-related death in Taiwan. During the past 20 years, several advances have improved the treatment outcome and quality of life of CRC patients. The purpose of this study was to identify the changes in the clinicopathological features and outcome of CRC over this period.
  
  
  METHODS
  Based on the computerized database of the Taipei Veterans General Hospital, between January 1981 and December 2000, 5,474 CRC patients were identified and divided into 2 groups based on the date of treatment (1981-1990 and 1991-2000). The clinicopathological features, outcome, and prognostic factors were analyzed and compared.
  
  
  RESULTS
  The age at onset of cancer was 61 years in the 1980s group and 66 years in the 1990s group. The frequency of rectal tumors decreased from 50% in the 1980s group to 44% in the 1990s group. Tumor, nodes, metastasis (TNM) stage distribution, surgical mortality, and anastomosis leakage were similar in the two groups. However, the 5-year overall survival rate was better in the 1990s group (56%) than that in the 1980s group (50%, P = 0.001). For rectal cancer patients, the local recurrence rate was lower in the 1990s group (6%) than that in the 1980s group (10%, P < 0.01). In stage III CRC, the 5-year overall survival rate was significantly higher in the 1990s group (54%) than that in the 1980s group (48%, P = 0.011). TNM stage was the most important independent prognostic factor for overall and disease-free survivals, followed by differentiation grade, CEA level, and treatment period.
  
  
  CONCLUSIONS
  Advances in surgical technique and more standard use of chemotherapy have improved CRC outcome.
authors: Division of Colon and Rectal Surgery, Department of Surgery, National Yang-Ming University, Taipei Veterans General Hospital, Taipei, Taiwan, ROC.
authors: Jiun-Ho
authors: JH
authors: Ju
authors: Shih-Ching
authors: SC
authors: Chang
authors: Huann-Shen
authors: HS
authors: Wang
authors: Shung-Haur
authors: SH
authors: Yang
authors: Jen-Kae
authors: JK
authors: Jiang
authors: Wei-Chone
authors: WC
authors: Chen
authors: Tzu-Chen
authors: TC
authors: Lin
authors: Hung Hsu
authors: Feng-Ming
authors: FM
authors: Wang
authors: Jen-Kou
authors: JK
authors: Lin
mesh_terms: D017668:Age of Onset; D000368:Aged; D000970:Antineoplastic Agents / Q000627:therapeutic use*; D002272:Carcinoembryonic Antigen / Q000097:blood; D002454:Cell Differentiation; D015179:Colorectal Neoplasms / Q000188:drug therapy / Q000276:immunology / Q000401:mortality* / Q000473:pathology / Q000601:surgery / Q000628:therapy*; D003131:Combined Modality Therapy; D013505:Digestive System Surgical Procedures; D018572:Disease-Free Survival; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D016347:Medical Records Systems, Computerized; D008875:Middle Aged; D009367:Neoplasm Staging; D016016:Proportional Hazards Models; D011788:Quality of Life; D012008:Recurrence; D013624:Taiwan / Q000453:epidemiology; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D000970:Antineoplastic Agents; D002272:Carcinoembryonic Antigen