POSTER SESSION III Tuesday, March 25, 2003   —  9:30 AM - 12:00 Noon Exhibit Hall A - C BONE AND SOFT TISSUE PATHOLOGY 1 Cyclin D3 Immunoreactivity Is a Frequent Event in Gastrointestinal Stromal Tumors in the Presence of Cyclin D3 Gene Extrasignals (72) G Pruneri, G Mazzarol, S Fabris, B Del Curto, A Neri, G Viale European Institute of Oncology and University of Milan, School of Medicine, Milan, Italy; Ospedale Maggiore Policlinico, Istituto di Ricovero e Cura a Carattere Scientifico, Milan, Italy 2 Low Risk (LR) Gastrointestinal Stromal Tumors (GISTs): A Clinicopathologic Study of 138 Cases (66) D Nonaka, J Qin, CR Antonescu Memorial Sloan-Kettering Cancer Center, New York, NY 3 Novel Gene FLJ10261 in Gastrointestinal Stromal Tumors (75) RB West, SC Linn, TO Nielsen, K Montgomery, JR Goldblum, R Patel, BP Rubin, P Brown, D Botstein, M van de Rijn Stanford University, Palo Alto, CA; Vancouver Hospital and Health Sciences Centre, Vancouver, BC, Canada; Cleveland Clinic Foundation, Cleveland, OH; University Washington Medical Center, Seattle, WA 4 CD44 Loss in Gastric Stromal Tumors as a Prognostic Marker (38) C Fisher, M Robinette Deasel, SC Abraham, SS Amr, SS Sheikh, A Chadburn, E Montgomery Royal Marsden Hospital, London, UK; Johns Hopkins Medical Institutions, Baltimore, MD 5 Extraskeletal Mesenchymal Chondrosarcoma: A Clinicopathologic and Molecular Study of 16 Cases (51) PA Isotalo, ME Lae, F Luzzato, AM Rua, RV Lloyd, TJ Sebo, DL Riehle, KK Unni, AG Nascimento Queen's University, Kingston, ON, Canada; Mayo Clinic, Rochester, MN 6 Epidermal Growth Factor Receptor (EGFR) Amplification in Malignant Peripheral Nerve Sheath Tumors (MPNST): An Immunohistochemical and Fluorescence In Situ Hybridization (FISH) Analysis (29) AG Chiesa-Vottero, EA Castilla, E Borden, M Hartke, DG Hicks, RR Tubbs, JR Goldblum Cleveland Clinic Foundation, Cleveland, OH 7 Immunohistochemistry (IHC) for mdm2 and cdk4 in Soft Tissue Sarcomas (STS): Analysis of a Series of 322 Cases and Comparison to Comparative Genomic Hybridization (CGH) Analysis (30) JM Coindre, M Pelmus, F Chibon, O Mariani, I Hostein, A Aurias Institut Bergonie, Bordeaux; Institut Curie, Paris, France 8 Immunophenotypic Profile of Anti-Apoptotic and Neuroectodermal Differentiation Pathways in Ewing Family of Tumors (EFT) (58) A Llombart-Bosch, S Navarro, P Giraudo Medical School, University of Valencia, Spain 9 Reliably and Sensitive Detection of Ewing's Sarcoma (ES) / PNET t(11;22) (EWS-FLI1) Translocation in Paraffin-Embedded Tissues, Using RT-PCR (44) L Guillou, JM Coindre, G Gallagher, D Ranchere Vince, JJ Michels, C Bouvier, O Delattre, J Benhattar Institute of Pathology, Lausanne, Switzerland; Bergonie Institute, Bordeaux, France; L. Berard Cancer Center, Lyon, France; F. Baclesse Cancer Center, Caen, France; La Timone Hospital, Marseille, France; Curie Institute, Paris, France 10 p53 Mutation, P16/CDKN2A Deletion, and EWS-FLI1 Fusion Type in Ewing Sarcoma. An Analysis of 60 Cases (50) PB Illei, Z Zhao, H-Y Huang, M Ladanyi Memorial Sloan-Kettering Cancer Center, New York, NY 11 In Situ Analysis of Telomere Length in Translocation Associated and Non-Translocation Associated Sarcomas (63) E Montgomery, P Argani, JL Hicks, AM DeMarzo, AK Meeker Johns Hopkins Medical Institutions, Baltimore, MD 12 Analysis of Anaphase Figures in Routine Histologic Sections Distinguishes Chromosomally Unstable Type Sarcomas from Types with Characteristic Translocations (62) E Montgomery, P Argani, C Fisher, SE Kern, C Lengauer Johns Hopkins University, Baltimore, MD; Royal Marsden Hospital, London, United Kingdom 13 Supernumerary Ring Chromosomes in Pleomorphic Hyalinizing Angiectatic Tumor: A Feature of Potential Diagnostic Utility (26) JA Bridge, JD Gentry, SJ Swarts, SD Billings, RS Bridge, Jr, PA Althof, D Pickering, JR Neff, SW Weiss University of Nebraska Medical Center, Omaha, NE; Indiana University, Indianapolis, IN; Emory University, Atlanta, GA 14 Array-Based Comparative Genomic Hybridization (ACGH) of Dermatofibrosarcoma Protuberans (DFSP) on cDNA Micorarrays Using DNA Isolated from Fresh Frozen and Paraffin Embedded Tissue (52) K Jensen, RB West, SX Zhu, SC Linn, TO Nielsen, JR Goldblum, R Patel, BP Rubin, D Botstein, P Brown, J Pollack, B Gilks, M van de Rijn Stanford University, Stanford, CA; Vancouver Hospital and Health Sciences Centre, Vancouver, BC; Cleveland Cancer Clinic Foundation, Cleveland, OH; University Washington Medical Center, Seattle, WA 15 Fluorescence In Situ Hybridization (FISH) Analysis of Cyclin D1 Gene Amplification in Epithelioid Sarcoma (57) L Lin, DG Hicks, JE Sigel, WF Bergfeld, E Montgomery, C Fisher, RR Tubbs, M Skacel, M Hartke, JR Goldblum Cleveland Clinic Foundation, Cleveland, OH; Johns Hopkins Hospital, Baltimore, MD; Royal Marsden NHS Trust, London, England, United Kingdom 16 Ex Vivo Hemangiogenesis in Fibrin Gels: A Morphological and Immunohistochemical AnalysisTAM (67) PE North, A Mizeracki University of Arkansas for Medical Sciences, Little Rock, AR