POSTER SESSION IV Tuesday, February 14, 2006   —  1:00 - 4:30 PM Exhibit Level GASTROINTESTINAL PATHOLOGY 47 MLH1 and PMS2 Protein Expression in 103 Colorectal Carcinomas with MLH1 Promoter Methylation and without MLH1 or PMS2 Germline Mutation (512) S Mahooti, H Hampel, J LaJeunesse, K Sotamaa, A de la Chapelle, WL Frankel - The Ohio State University Medical Center, Columbus, OH 48 Aberrant Cpg Island Methylation, BRAF/KRAS Mutation, Microsatellite Instability, And Genotypes of MTHFR in Colorectal Carcinomas and their Relationships (507) S Lee, NY Cho, GH Kang - National Cancer Center, Geyonggi-do, Seoul National University College of Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea 49 Is Microsatellite Instability The Main Prognostic Factor In Poorly Differentiated Colon Cancer? (460) S Bakdash, G Mantha, D Lomago, J Hunt, S Kuan - University of Pittsburgh, Pittsburgh, PA 50 Amsterdam Criteria, Bethesda Guidelines and Histologic Findings in 34 Patients with Hereditary Nonpolyposis Colorectal Cancer (513) S Mahooti, H Hampel, J LaJeunesse, A de la Chapelle, WL Franke - The Ohio State University Medical Center, Columbus, OH 51 Microsatellite Instability (MSI) in Colorectal Carcinomas - Prospective Correlation of Clinicopathologic Features with MSI Status (506) N Lagwinski, A Bennett, JR Goldblum, W Henricks, M Skacel, M Yearsley, L Yerian, T Bauer, MP Bronner - The Cleveland Clinic Foundation, Cleveland, OH 52 CDX2 Staining Is Decreased In Microsatellite Unstable Colorectal Carcinomas (481) LB De Lott, WM Smith, A Lehman, A de la Chapelle, WL Frankel - The Ohio State University, Columbus, OH 53 Expression of Her1 and Her2 in MSI Positive and Negative Colonic Adenocarcinoma (492) E Hsieh, A Plotkin, M Khalifa, M Khalil, WM Hanna - Sunnybrook & Women's College Health Sciences Centre, Toronto, ON, Canada 54 Mismatch Repair Protein Status of Colorectal Small Cell Neuroendocrine Carcinomas (547) EB Stelow, CH Moskaluk, SE Mills University of Virginia, Charlottesville, VA 55 Prevalence and Clinicopathologic Features of Colorectal High-Grade Neuroendocrine Carcinomas Associated with Overlying Adenoma (561) KL Wang, L Liu, JC Yao, H Wang, A Rashid, SR Hamilton, TT Wu - UT MD Anderson Cancer Center, Houston, TX 56 Rectal Adenocarcinoma With Oncocytic Features: Possible Relationship To Pre-Operative Chemoradiotherapy (541) S Serra, M Rouzbahman, R Chetty - University Health Network/Toronto Medical Laboratories, University of Toronto, Toronto, ON, Canada 57 Sentinel Lymph Node Mapping In Colorectal Cancer—Benign Mechanical Transport Of Epithelial Cells Is Not A Significant Factor (571) B Yestrepsky, S Saha, D Wiese - Michigan State Univ McLaren Reg Med Center, Flint, MI 58 Low Rectal Cancer; A Call For A Change Of Approach In Abdominoperineal Resection (521) ID Nagtegaal, JH van Krieken, CJ van de Velde, CA Marijnen, P Quirke - Radboud University Nijmegen Medical Center, Nijmegen, Netherlands; Leiden University Medical Center, Leiden, Netherlands; Univerity of Leeds, Leeds, United Kingdom 59 Loss of Extracellular Ep-CAM in Invasive Colorectal Carcinoma Cells (491) M Gosens, L van Kempen, CJ van de Velde, IM Nagtegaal, JH van Krieken - Radboud University Medical Center, Nijmegen, Netherlands; Leiden University Medical Center, Leiden, Netherlands 60 EGFR Expression In Advanced Colorectal Adenocarcinoma: A Study Of 415 Cases (535) S Rossi, M Fedrigo, S Chinellato, E Orvieto, F Canal, A Furlanetto, L Laurino, AP Dei Tos - Hospital of Treviso, Treviso, Italy 61 Comparison of  Three Commercially Available  Immunohistochemical  Tests for  EGFR  Expression  in  Colorectal Cancers. Is Immunohistochemistry Reliable? (528) FM Penault-Llorca, A Cayre, L Arnould, F Bibeau, MP Bralet, P Rochaix, JC Sabourin - Centre Jean Perrin; Centre GF Leclerc; Centre Val D Aurelle; Hop Paul Brousse; Institut Claudius Regaud; Hop C Nicolle, France 62 There is No Relationship Between Loss of 8P and Overexpression of Clusterin in a Consecutive Series of 81 sporadic MSS Colorectal Carcinomas (520) N Mourra, E Tiret, A Balaton, J-F Flejou, G Thomas, S Olschwang - St-Antoine Hospital, St-Joseph Hospital, St-Louis Hospital, Paris, France; Paoli-Calmettes, Marseille, France 63 Expression of Aspartyl (Asparaginyl) ²-hydroxylase in Colon Cancer and its Prognostic Value in Stage II Colon Cancer (559) J Wang, S de la Monte, E Sabo, S Kethu, JR Wands, MB Resnick - Rhode Island Hospital and Brown University School of Medicine, Providence, RI 64 p4EBP1 In Colorectal Carcinomas Is Associated With Tumor Stage And Reflects The Real Oncogenic Role Of The mTOR Pathway (480) M Cuatrecasas, P Espinoza, F Rojo, C Iglesias, J Jimenez, J Tabernero, E Espin, H Allende, I de Torres, S Ramon y Cajal - Vall d'Hebron University Hospital, Barcelona, Spain 65 Identification Of Genes Associated With Colon Carcinoma Metastasis Using "Silico" Microdissection (457) A Andea, J Shia, D Notterman, P Paty, W Gerald - MSKCC, New York, NY; UMDNJ, Newark, NJ