title: [Clinical significance of a transient increase in carcinoembryonic antigen and carbohydrate antigen 19-9 in patients with metastatic colorectal cancer receiving chemotherapy].
abstract: OBJECTIVE
  An increase in carcinoembryonic antigen (CEA) and/or carbohydrate antigen 19-9 (CA19-9) levels is generally considered as tumor progression in patients with metastatic colorectal cancer (MCRC). However, a transient CEA surge has been observed in patients with MCRC responding to chemotherapy. This study was to investigate the clinical significance of transient CEA/CA19-9 surges in Chinese MCRC patients.
  
  
  METHODS
  One hundred and twenty-one MCRC patients with histologically proven adenocarcinoma and baseline ECOG performance status of < or =2 were treated with oxaplatin and (or) irinotecan-based chemotherapy regimens. Serum CEA and CA 19-9 levels were measured before and after chemotherapy.
  
  
  RESULTS
  Of the 121 patients, 14 (11.6%) had transient CEA surges with median baseline CEA level of 45 microg/L (9.67-2208 microg/L) and median surge peak level of 80.1 microg/L (13.38-4044 microg/L). The transient CEA surge occurred at a median of 4 weeks (2-6 weeks), and lasted for a medium of 6.5 weeks (4-14 weeks). Of the 14 patients, 11 received oxaplatin-based chemotherapy; three received irinotecan-based chemotherapy. All the 14 patients showed clinical benefit from chemotherapy, among which seven achieved partial response and seven had stable disease. In the meantime, five patients (3.8%) had transient CA19-9 surges. However, no significant correlation was found between an increase in the CA19-9 level and clinical benefits.
  
  
  CONCLUSIONS
  Transient CEA surges can be observed in Chinese MCRC patients receiving oxaplatin or irinotecan-based chemotherapy, which does not indicate tumor progression, but good therapeutic efficacy. A transient elevation of CA19-9 is not correlated to short-term clinical benefits.
authors.affiliation: State Key Laboratory of Oncology in South China, Guangzhou, Guangdong, 510060, PR China.
authors.forename: Yu-Hong
authors.initials: YH
authors.lastname: Li
authors.forename: Xin
authors.initials: X
authors.lastname: An
authors.forename: Xiao-Juan
authors.initials: XJ
authors.lastname: Xiang
authors.forename: Zhi-Qiang
authors.initials: ZQ
authors.lastname: Wang
authors.forename: Feng-Hua
authors.initials: FH
authors.lastname: Wang
authors.forename: Fen
authors.initials: F
authors.lastname: Feng
authors.forename: Wen-Qi
authors.initials: WQ
authors.lastname: Jiang
authors.forename: You-Jian
authors.initials: YJ
authors.lastname: He
authors.forename: Rui-Hua
authors.initials: RH
authors.lastname: Xu
mesh_terms: D000230:Adenocarcinoma / Q000097:blood / Q000188:drug therapy / Q000473:pathology / Q000556:secondary; D000293:Adolescent; D000328:Adult; D000368:Aged; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use*; D018395:CA-19-9 Antigen / Q000097:blood*; D002166:Camptothecin / Q000008:administration & dosage / Q000031:analogs & derivatives; D000069287:Capecitabine; D002272:Carcinoembryonic Antigen / Q000097:blood*; D002648:Child; D003110:Colonic Neoplasms / Q000097:blood / Q000188:drug therapy* / Q000473:pathology; D003841:Deoxycytidine / Q000031:analogs & derivatives / Q000627:therapeutic use; D018450:Disease Progression; D005260:Female; D005472:Fluorouracil / Q000031:analogs & derivatives / Q000627:therapeutic use; D006801:Humans; D000077146:Irinotecan; D002955:Leucovorin / Q000627:therapeutic use; D008113:Liver Neoplasms / Q000097:blood / Q000188:drug therapy / Q000556:secondary; D008175:Lung Neoplasms / Q000097:blood / Q000188:drug therapy / Q000556:secondary; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D009944:Organoplatinum Compounds / Q000008:administration & dosage / Q000627:therapeutic use; D000077150:Oxaliplatin; D010071:Oxaloacetates; D012004:Rectal Neoplasms / Q000097:blood / Q000188:drug therapy* / Q000473:pathology; D012074:Remission Induction; D055815:Young Adult
chemical_list: D018395:CA-19-9 Antigen; D002272:Carcinoembryonic Antigen; D009944:Organoplatinum Compounds; D010071:Oxaloacetates; D000077150:Oxaliplatin; D003841:Deoxycytidine; D000069287:Capecitabine; D000077146:Irinotecan; D002955:Leucovorin; D005472:Fluorouracil; D002166:Camptothecin