POSTER SESSION II Monday, March 24, 2003   —  1:00 - 4:30 PM Exhibit Hall A - C GASTROINTESTINAL PATHOLOGY 46 Significance of Biologic Markers in Esophageal Squamous Cell Carcinomas (518) MS Chang, HS Lee, HS Kim, YT Kim, WH Kim Seoul National University College of Medicine Boramae Hospital, Seoul, Republic of Korea 47 Laser Scanning Confocal Microscopic Appearance of Upper Gastrointestinal Lesions (589) MC Pacheco Chester, DM Maru, CM Fenoglio-Preiser University of Cincinnati College of Medicine, Cincinnati, OH 48 Experimentaly Induced Carcinogenesis of Esophageal Mucosa and Its Inhibition by Flavopiridol in p27 Knockout Mice (569) M Lechpammer, X Xu, N Bhattacharya, HF Ellis, M Loda Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA; Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Brigham and Women's Hospital, Harvard Medical School, Boston, MA 49 Receptor Activator of Nuclear Factor KappaB (RANK) Is Expressed as a Late Event during Malignant Progression in Barrett's Esophagus (625) R Yorke, A Younes, M Chirala, M Younes Baylor College of Medicine and the Methodist Hospital, Houston, TX; UT MD Anderson Cancer Center, Houston, TX 50 Loss of Mucin Core Polypeptide Expression in the Progression of Dysplasia in Barrett's Esophagus (538) JN Glickman, P Blount, C Sanchez, D Cowan, J Wongsurawat, BJ Reid, RD Odze Brigham and Women's Hospital, Boston, MA; Fred Hutchinson Cancer Research Center, Seattle, WA 51 Prevalence and Clinical Significance of Neuroendocrine Differentiation in Esophageal and Gastroesophageal Junction Adenocarcinoms (621) Q Yang, KR Cleary, PS Houlihan, JC Yao, SG Swisher, R Komaki, JA Ajani, A Rashid, SR Hamilton, T-T Wu UT MD Anderson Cancer Center, Houston, TX 52 Cytokeratin 7/20 and MUC1-6 Expression in Esophageal and Gastric Adenocarcinomas (540) C Gulmann, I Counihan, A Grace, M Leader, S Patchett, E Kay Royal College of Surgeons in Ireland, Dublin, Ireland 53 CK-7, CK-20 and Mucin Gene Expression in Gastric Inlet Patch (568) GY Lauwers, M Mino, S Ban, H Sevestre Massachusetts General Hospital, Boston, MA; Saitama Medical School, Saitama, Japan; CHU d'Amiens, Amiens, France 54 The Gastric Cardia Increases in Size with GERD and with Chronic H. Pylori Infection (587) H Ota, D Graham, T Katsuyama, H El-Zimaity Shinshu University Hospital, Matsumoto, Japan; Baylor College of Medicine, Houston, TX 55 The Expression of Trefoil Peptide (TFF) and Glandular Atrophy in Helicobacter Pylori Associated Gastritis (554) RS Jin, S Ban, T Mitsuhashi, F Ogawa, Y Shimizu, T Hirose, M Shimizu Saitama Medical School, Saitama, Japan 56 Gastric Surface Metaplasia in the Duodenal Bulb Is Not Ectopic Antral Mucosa (620) W Xin, BJ McKenna, HD Appelman University of Michigan, Ann Arbor, MI 57 Aging-Related Methylation of Chronic Gastritis In Relation to Sex or Helicobacter Pylori (559) GH Kang, WH Kim, S Lee, JS Kim, JY Ro Seoul National University Hospital, Seoul, Korea; National Cancer Center, Ilsan, Korea; Asan Medical Center, Seoul, Korea 58 The Effect of Helicobacter Pylori Infection on the Proliferative and Apoptotic Activity of the Gastric Mucosa (555) F Kacar, I Meteoglu, E Levi Adnan Menderes University Medical School, Aydin, Turkey; John D. Dingell VA Medical Center, Detroit, MI 59 Strong Association of Acute Superficial Gastritis with Gastric Ulcer (571) MJ Lee, IC Lee, Asan Medical Center, Seoul, Korea 60 Assessment of Clarithromycin Resistance of Helicobacter Pylori in Formalin-Fixed and Paraffin-Embedded Gastric Biopsy Samples (605) A Soltermann, A Perren, S Schmid, R Gueller, K Weber, J Meier, F Eigenmann, P Komminoth Kantonsspital, Baden, AG, Switzerland; Universitaetsspital, Zuerich, ZH, Switzerland 61 Histopathology of Interval Appendectomy Specimens: Strong Association with Granulomatous Appendicitis (543) G Guo, JK Greenson University of Michigan Health System, Ann Arbor, MI 62 Pseudomembranous Variant of Collagenous Colitis (532) MI Fiel, D Robbins, N Harpaz The Mount Sinai Medical Center, New York, NY 63 Correlation of Fecal Leukocyte Studies and Gastrointestinal Diagnoses in 205 Inpatients (539) LA Granville, P Cernoch, JR Davis Baylor College of Medicine, Houston, TX; The Methodist Hospital, Houston, TX 64 Biopsies of Colonoscopically Normal Mucosa in Adult Patients with Chronic Diarrhea Provide Diagnostically Relevant Information in Most Cases (578) BJ McKenna, HD Appelman University of Michigan, Ann Arbor, MI 65 Colonic Spirochetosis in Non-Immunosuppressed Children and Adults (566) A Koteish, S Abraham, M Torbenson Johns Hopkins Hospital, Baltimore, MD 66 Intestinal Shiga Toxin-1 Binding and Receptor Expression Are in the Endothelium and Not the Epithelium (522) F Clayton, DE Kohan Salt Lake VA, Salt Lake City, UT; University of Utah, Salt Lake City, UT 67 Altered Small Bowel and Rectal Epithelial Adherens Junctions in HIV Infection (521) F Clayton, DP Kotler Salt Lake VA, Salt Lake City, UT; University of Utah, Salt Lake City, UT; St. Lukes/Roosevelt Hosp. and Columbia University, New York, NY