POSTER SESSION I Monday, March 24, 2003   —  9:30 AM - 12:00 Noon Exhibit Hall A - C GASTROINTESTINAL PATHOLOGY 80 Molecular Markers and Prediction of Response to Chemoradiation in Esophageal Adenocarcinoma (504) BP Adley, MS Talamonti, S Sundaresan, M Mulcahey, MS Rao The Feinberg School of Medicine, Northwestern University, Chicago, IL 81 Molecular Profile of Pseudomyxoma Peritonei (506) HA Al-Ahmadie, HH Dimashkieh, J Wang, A Lowy, J Sussman, CM Fenoglio-Preiser University of Cincinnati, Cincinnati, OH 82 Detection of p53 Mutations in Premalignant Esophageal Lesions and Esophageal Adenocarcinoma Using Laser Capture Microdissection (527) A Djalilvand, H Goldman, DA Antonioli, O Kocher Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 83 Gastrointestinal Cytomegalovirus Disease: A Comparison in Detection by Plasma PCR and Gastrointestinal Biopsy (530) GE Eudy, AT Davis, FS Nolte Emory University, Atlanta, GA 84 Identification of Novel Targets in Biliary Tract Cancers Using Global Gene Expression Technology (545) DE Hansel, A Rahman, RH Hruban, R Shulick, PThuluvath, J-L Ku, J-G Park, J Geradts, K Miyazaki, R Ashfaq, M Hidalgo, P Argani, A Maitra Johns Hopkins University School of Medicine, Baltimore, MD; Seoul National University, Seoul, Korea; Roswell Park Cancer Institute, Buffalo, NY; University of Saga, Saga, Japan; UT Southwestern Medical Center, Dallas, TX 85 Prevalence and Significance of Acellular Mucin Pools in the Esophagus Post Neoadjuvant Chemoradiotherapy for Barrett's Associated Adenocarcinoma (550) JL Hornick, FA Farraye, HH Wang, RD Odze Brigham and Women's Hospital, Boston, MA; Boston Medical Center, Boston, MA; Beth Israel Deaconess Medical Center, Boston, MA 86 Useful Clinicopathological and Immunohistochemical Parameters for the Identification of Colorectal Carcinomas with High Microsatellite Instability (564) SH Kim, H Kim College of Medicine, Yonsei University, Seoul, Korea 87 Utility of Immunohistochemistry in Distinguishing Primary Gut Adenocarcinoma from Metastatic Breast Carcinoma in the Gastrointestinal Tract (585) FP O'Connell, HH Wang, RD Odze Brigham and Women's Hospital, Boston, MA; Beth Israel Deaconess Medical Center, Boston, MA 88 Clinical, Pathologic and Immunohistochemical Characteristics of Colonic Mixed Hyperplastic/Adenomatous Polyps Suggests That They Are a Precursor to Serrated Adenomas (586) K Oh, M Redson, RD Odze Brigham and Women's Hospital, Boston, MA 89 Expression of CCR7 Is Not Predictive of Nodal Disease in Colonic Adenocarcinomas (590) O Padilla, A Srivastava, JS Ditelberg New England Medical Center, Boston, MA 90 Induction of Apoptosis Following Inhibition of Signal Transducer and Activator of Transcription 3 (STAT3) in Gastrointestinal Stromal Tumors (592) GP Paner, S Silberman, G Hartman, S Alkan Loyola University Medical Center, Maywood, IL 91 Abnormal Upper Gastrointestinal Histopathology in Ulcerative Colitis (595) S Prakash, C Changsri, E Vasiliauskas, K Papadakis, M Abreu, B Hu Inflammatory Bowel Disease Center, Cedars-Sinai Medical Center, Los Angeles, CA 92 Endoglin (CD105) and Vascular Endothelial Growth Factor (VEGF) as Prognostic Markers in Colon Cancer (597) RS Saad, YL Liu, G Nathan, J Celebrezze, D Medich, MY Tung, JF Silverman Allegheny General Hospital, Pittsburgh, PA 93 Increased Expression of Cyclooxygenase-2 in Adenocarcinoma Arising in Barrett's Esophagus: An Indicator of Chemopreventive Potential (613) KL Wang, DM Weinrach, JR Ramirez, KA Hill, MS Rao Feinberg School of Medicine, Northwestern University, Chicago, IL 94 Acute Inflammation in Lymphocytic and Collagenous Colitis (615) DM Weinrach, KL Wang, JR Ramirez, KA Hill, MS Rao Feinberg School of Medicine, Northwestern University, Chicago, IL