POSTER SESSION III Tuesday, March 1, 2005   —  9:30 AM - 12:00 Noon Convention Center, Exhibit Hall B BONE & SOFT TISSUE PATHOLOGY 1 Detection and Genotypic Identification of Characteristic Fusion Gene Transcripts from Formalin-Fixed Soft Tissue Tumor Specimens Using Multiplex RT-PCR/Capillary Electrophoresis (87) JA Thorson, RE Ruiz, HC Weigelin, JK Howard, DR Lucas - University of Michigan, Ann Arbor, MI 2 FISH as an Ancillary Diagnostic Tool for the Diagnosis of Ewing Sarcoma/PNET in Routinely Processed Tissue (80) V Rajaram, RS Bridge, JD Pfeifer, A Perry - Washington University School of Medicine, St. Louis, MO 3 Detection of Ewing and Synovial Sarcoma Fusion Transcripts Using Conventional and Real-Time PCR (44) TC Diss, F Berisha, L Lam, AM Flanagan - University College London Hospitals NHS Trust, London, United Kingdom; Institute of Orthopaedics, London, United Kingdom 4 Dual-Color, Break-Apart Fluorescence In Situ Hybridization for EWS Gene Rearrangement Distinguishes Clear Cell Sarcoma of Soft Parts from Malignant Melanoma (76) RM Patel, SW Weiss, AL Folpe, E Downs-Kelly, RR Tubbs, RJ Tuthill, JR Goldblum, M Skacel - Emory University, Atlanta, GA; The Cleveland Clinic Foundation, Cleveland, OH 5 Initial Experience with a Dual-Color, Break-Apart Fluorescence In Situ Hybridization (FISH) Assay for Detection of SYT Gene Rearrangements in Synovial Sarcoma (77) RM Patel, E Downs-Kelly, JR Goldblum, R Tubbs, M Skacel - Emory University, Atlanta, GA; The Cleveland Clinic Foundation, Cleveland, OH 6 Detection and Genotypic Classification of SYT/SSX Transcripts from Synovial Sarcomas Using Multiplex RT-PCR/Capillary Electrophoresis (88) JA Thorson, RE Ruiz, HC Weigelin, JK Howard, DR Lucas - University of Michigan, Ann Arbor, MI 7 Incidence of NF1Deletion and t(X;18) in Synovial Sarcoma and Malignant Peripheral Nerve Sheath Tumor (49) C Fuller, J Dalton, E Stewart, S Shurtleff St Jude Children's Research Hospital, Memphis, TN 8 SYT-SSX Fusion Transcripts in Synivial Sarcoma (SS) of Unusual Sites (38) YM Cho, J Choi, KJ Cho, SK Khang, JY Ro - University of Ulsan College of Medicine, 388-1, Poongnap-dong, Songpa-gu, Seoul, Republic of Korea 9 Signaling Molecules in Primary and Metastatic Synovial Sarcoma; a Tissue Microarray Study (58) AE Horvai, MJ Kramer, R O'Donnell - University of California, San Francisco, CA, 10 Cluster Analysis of Immunohistochemical Profiles in Malignant Peripheral Nerve Sheath Tumor (MPNST), Ewing Sarcoma (EWS) and Synovial Sarcoma (SS) Segregates Distinct Tumor Subpopulations (74) SH Olsen, DG Thomas, DR Lucas University of Michigan, Ann Arbor, MI 11 STAT3 Activation in Ewing Sarcoma Family of Tumors (61) R Lai, C Rodriguez-Galindo, F Navid, CE Fuller, HM Amin, J Dalton, JJ Jenkins, JD Khoury - St. Jude Children's Research Hospital, Memphis, TN; University of Alberta, Edmonton, AB, Canada; M.D. Anderson Cancer Center, Houston, TX 12 MLH-1 and MSH-2 Immunoreactivity and Microsatellite Instability: A Comparison of Clear Cell Sarcoma and Metastatic Melanoma (50) J Garcia, MJ Kramer, R O'Donnell, AE Horvai University of California, San Francisco 13 D2-40 Is a Useful Marker for Subtyping Rhabdomyosarcoma (RMS) (92) PJ Zhang, B Pawel, TL Pasha, FG Barr - University of Pennsylvania Medical Center, Philadelphia, PA; Children Hospital of Philadelphia, Philadelphia, PA 14 Expression of Tumor Suppressor Gene Ini1 Is Down-Regudated in Epithelioid Sarcoma (ES), Biologic and Diagnostic Implications (91) PJ Zhang, TL Pasha, JR Goldblum - University of Pennsylvania Medical Center, Philadelphia, PA; Cleveland Clinic Foundation, Cleveland, OH 15 The Alveolar Soft Part Sarcoma Marker TFE3 Is Also Frequently Expressed in Granular Cell Tumor (93) C Zhu, J Melamed, G Sidhu, P Argani, M Ladanyi, P Illei - New York University School of Medicine, New York, NY; Johns Hopkins Medical Center, Baltimore, MD; Memorial Sloan-Kettering Cancer Center, New York, NY 16 The Utility of ß-Catenin in the Distinction between Fibromatosis and Its Morphologic Mimics (90) H Yaziji, AA Renshaw, EW Gould, TS Barry, AM Gown - Baptist Hospital, Miami, FL; PhenoPath Laboratories, Seattle, WA 17 CSF1R Expression in Soft Tissue Tumors (89) RB West, G Kaygusuz, S Subramanian, CL Corless, BP Rubin, K Montgomery, SX Zhu, TO Nielsen, R Patel, JR Goldblum, PO Brown, MC Heinrich, I Kuzu, M van de Rijn - Stanford University Medical Center, Palo Alto, CA; Ankara University Medical School, Ankara, Turkey; Oregon Health & Science University Cancer Institute, Portland, OR; University of Washington Medical Center, Seattle, WA; Vancouver General Hospital, Vancouver, BC, Canada; Emory University School of Medicine, Atlanta, GA; Cleveland Clinic Foundation, Cleveland, OH 18 Epidermal Growth Factor Receptor (EGFR) Pathway in Osteosarcoma (OS): An Immunohistochemical Study (69) NE Muscato, SJ Olson, H Wu, AL Gonzalez Vanderbilt University Medical Center, Nashville, TN 19 Nestin Expression in Malignant Peripheral Nerve Sheath Tumor (MPNST) and Other Soft Tissue Tumors (84) S Shimada, T Tsuzuki, T Nagasaka, M Kuroda, K Hara, E Takahashi, S Hayakawa, K Ono, N Maeda, N Mori - Nagoya University and Nagoya DRC Hosp., Nagoya, Japan; Fujita Health Univ., Aichi, Japan; Aichi Med Univ., Aichi, Japan; Aichi Cancer Center, Nagoya, Japan; Anjo K Hosp and Tosei G Hosp., Aichi, Japan 20 Extensively Cytokeratin-Positive Schwannomas: A Little-Recognized Diagnostic Pitfall (56) MC Herrera, SW Weiss, AL Folpe Emory University, Atlanta, GA 21 Novel Gene ANKS1 Expression in Gastrointestinal Stromal Tumors (59) AN Kalof, RB West, S Subramanian, S Zhu, K Montgomery, TO Nielsen, JR Goldblum, R Patel, BP Rubin, M Van de Rijn - Stanford University, Stanford, CA; Vancouver General Hospital, Vancouver, BC, Canada; Cleveland Clinic Foundation, Cleveland, OH; Emory University, Atlanta, GA; University of Washington Medical Center, Seattle, WA 22 Ezrin Expression in Gastrointestinal Stromal Tumors (GIST): A Comparison with Tumors of Smooth Muscle and Nerve Sheath Origin (78) A Piotrowski, M Tretiakova, AG Montag University of Chicago, Chicago, IL 23 Gastrointestinal Stromal Tumors (GISTs) of Stomach in Children and Young Adults - A Study of 46 Cases (68) M Miettinen, J Lasota, LH Sobin - Armed Forces Institute of Pathology, Washington, DC; Armed Forces Institute of Pathology, Washington, DC