PMID- 15890245 OWN - NLM STAT- MEDLINE DCOM- 20050712 LR - 20101118 IS - 0304-3835 (Print) IS - 0304-3835 (Linking) VI - 223 IP - 1 DP - 2005 Jun 1 TI - Gastric cancer cell detection in peritoneal lavage: RT-PCR for carcinoembryonic antigen transcripts versus the combined cytology with peritoneal carcinoembryonic antigen levels. PG - 129-35 AB - Free cancer cells exfoliated from the serosal surfaces of primary cancers are considered to be responsible for peritoneal dissemination, which are both the most frequent pattern of treatment failure and the most important cause of death in gastric cancer patients. Detection of free cancer cells in the peritoneal cavity at the time of surgery, therefore, is thought to be of great value in predicting peritoneal recurrence and accordingly the prognosis of gastric cancer patients. This study was designed to determine whether free cancer cells in peritoneal lavage fluid from gastric cancer patients could be identified by a reverse-transcriptase polymerase chain reaction (RT-PCR) method specific to carcinoembryonic antigen (CEA) mRNA. Simultaneously, the results from conventional cytological examination were evaluated and the levels of CEA in peritoneal lavage were determined. Of the 40 gastric cancer patients enrolling in this investigation, 11 (27.5%) were positive for CEA mRNA in their peritoneal lavage, whereas only 6 (15%) and 8 (20%) were shown to be positive by cytological examination and peritoneal CEA (pCEA) assay, respectively. Furthermore, RT-PCR positive for CEA mRNA was correlated with the depth of tumor invasion (P<0.001), lymph node metastases (P=0.004), the TNM stage (P<0.001) and peritoneal recurrence (P<0.001). The technique of RT-PCR was more sensitive than conventional cytological examination and pCEA levels in the detection of peritoneal free cancer cells as well as in the prediction of peritoneal recurrence. In addition, CEA RT-PCR had a high concordance rate (82.5%) with the combination of cytology with pCEA levels. These observations suggest that it is feasible to identify free cancer cells in peritoneal lavage by using a CEA mRNA-specific RT-PCR method, and this assay can be a promising diagnostic modality for evaluating the risk of peritoneal dissemination in gastric cancer patients following operations. FAU - Wang, Jaw-Yuan AU - Wang JY AD - Department of Surgery, Kaohsiung Medical University and Hospital, 100 Tzyou 1st Road, Kaohsiung 807, Taiwan, ROC. FAU - Lin, Shiu-Ru AU - Lin SR FAU - Lu, Chien-Yu AU - Lu CY FAU - Chen, Chung-Chi AU - Chen CC FAU - Wu, Deng-Chyang AU - Wu DC FAU - Chai, Chee-Yin AU - Chai CY FAU - Chen, Fang-Ming AU - Chen FM FAU - Hsieh, Jan-Sing AU - Hsieh JS FAU - Huang, Tsung-Jen AU - Huang TJ LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20041028 PL - Ireland TA - Cancer Lett JT - Cancer letters JID - 7600053 RN - 0 (Carcinoembryonic Antigen) RN - 0 (RNA, Messenger) SB - IM MH - Carcinoembryonic Antigen/analysis/*genetics MH - Female MH - Humans MH - Male MH - Middle Aged MH - Peritoneal Cavity/*pathology MH - RNA, Messenger/analysis MH - Reverse Transcriptase Polymerase Chain Reaction/*methods MH - Stomach Neoplasms/diagnosis/*pathology MH - Therapeutic Irrigation EDAT- 2005/05/14 09:00 MHDA- 2005/07/13 09:00 CRDT- 2005/05/14 09:00 PHST- 2004/07/26 00:00 [received] PHST- 2004/09/16 00:00 [revised] PHST- 2004/09/20 00:00 [accepted] PHST- 2005/05/14 09:00 [pubmed] PHST- 2005/07/13 09:00 [medline] PHST- 2005/05/14 09:00 [entrez] AID - S0304-3835(04)00739-6 [pii] AID - 10.1016/j.canlet.2004.09.031 [doi] PST - ppublish SO - Cancer Lett. 2005 Jun 1;223(1):129-35. doi: 10.1016/j.canlet.2004.09.031. Epub 2004 Oct 28.