POSTER SESSION II Monday, March 24, 2003   —  1:00 - 4:30 PM Exhibit Hall A - C BONE AND SOFT TISSUE PATHOLOGY 1 Dedifferentiated Chondrosarcoma (DCHS) of the Pelvis. A Report of the Clinicopathologic Features of Fourteen Cases Treated at the Istituto Rizzoli (24) F Bertoni, A El Ghoneimy, P Bacchini, CY Inwards, D Donati Rizzoli Orthopaedic Institute, Bologna, Italy; Mayo Clinic, Rochester, MN 2 Osteosarcoma (OGS) of the Pelvis. The Rizzoli Institute Experience (25) F Bertoni, P Bacchini, CY Inwards, D Donati Rizzoli Orthopaedic Institute, Bologna, Italy; Mayo Clinic, Rochester, MN 3 Follow-Up Study of Long-Term Survivors of Osteosarcoma in the Pre-Chemotherapy Era (42) RL Gaffney, KK Unni, FH Sim, Mayo Clinic, Rochester, MN 4 Multicentric Giant Cell Tumor of Bone: A Clinicopathologic Analysis of Thirty Cases (46) BL Hoch, C Inwards, AE Rosenberg Massachusetts General Hospital; Harvard Medical School, Boston, MA; Mayo Clinic, Rochester, MN 5 Base of Skull Chordomas in Children and Adolescents: A Clinicopathologic Analysis of 72 Cases (45) BL Hoch, GP Nielsen, NJ Liebsch, AE Rosenberg Massachusetts General Hospital; Harvard Medical School, Boston, MA 6 Synovial-Type Giant Cell Tumors (STGCT) of the Vertebral Column 6 (41) MA Furlong, K Motamedi, WB Laskin, M Murphy, TN Vinh, D Sweet, JF Fetsch AFIP, Washington, DC; NW University, Chicago, IL 7 Most Inflammatory MFH (IMFH) Are Dedifferentiated Liposarcomas (DDLS). Analysis of 7 IMFH and Comparison to 8 DDLS with an IMFH Component (31) JM Coindre, L Guillou, F Chibon, O Mariani, I Hostein, A Aurias Institut Bergonie, Bordeaux, France; Institut de Pathologie, Lausanne, Switzerland; Institut Curie, Paris, France 8 Dedifferentiated Liposarcoma (DDL) of the Extremities (23) V Barbashina, S Singer, CR Antonescu Memorial Sloan-Kettering Cancer Center, New York, NY 9 Deep Juvenile Xanthogranuloma. A Study of 30 Intramuscular and 19 Subcutaneous Cases (35) JC Fanburg-Smith, BP Rubin, M Miettinen Armed Forces Institute of Pathology, Washington, DC; University of Washington, Seattle, WA 10 Synovial Sarcoma Arising within the Abdomen and Pelvis (37) C Fisher, AL Folpe, SW Weiss Royal Marsden Hospital, London, United Kingdom; Emory University Hospital, Atlanta, GA 11 Most Phosphaturic Mesenchymal Tumors Are a Single Entity: An Analysis of 31 Cases (39) AL Folpe, JC Fanburg-Smith, SW Weiss, The Phosphaturic Mesenchymal Tumor Study Group Emory University, Atlanta, GA; AFIP, Washington, DC 12 Soft Tissue Sarcomas of the Heart: The Clinico-Histopathologic Features of 19 Surgical Cases (65) N Narula, JJ Brooks, JR Goldblum, R Seethala, B Yoder, PJ Zhang University of Pennsylvania Medical Center, Philadelphia, PA; Cleveland Clinic Foundation, Cleveland, OH 13 Metastases to Soft Tissue Sites: Review of 86 Cases over a 30 Year Period (71) DM Perez- Montiel, JA Plaza, P Wakely, S Suster Ohio State University Medical Center, Columbus, OH 14 $-Catenin Expression in Reactive and Neoplastic Fibroblastic Proliferations (22) PM Arnell, AE Rosenberg, GP Nielsen Massachusetts General Hospital, Boston, MA 15 Inflammatory Myofibroblastic Tumors in Adults (73) BP Rubin, CM Coffin, JC Fanburg-Smith University of Washington, Seattle, WA; University of Utah, Salt Lake City, UT; Armed Forces Institute of Pathology, Washington, DC 16 Epithelioid Sarcoma: New Insights Based on an Extended Immunohistochemical Profile (55) WB Laskin, M Miettinen Feinberg School of Medicine, Northwestern University, Chicago, IL; Armed Forces Institute of Pathology (AFIP), Washington, DC 17 Alveolar Soft Part Sarcoma of the Tongue: 14 Cases (34) JC Fanburg-Smith, M Miettinen, AL Folpe, SW Weiss, ELB Childers Armed Forces Institute of Pathology, Washington, DC; Emory University, Atlanta, GA 18 Utility of the Immunohistochemical Detection of HHV-8 in the Diagnosis of Kaposi's Sarcoma (70) RM Patel, JR Goldblum, ED Hsi Cleveland Clinic Foundation, Cleveland, OH 19 Protein Gene Product 9.5 (PGP 9.5) Is Not a Specific Marker of Neural and Nerve Sheath Tumors: An Immunohistochemical Study of 97 Mesenchymal Neoplasms (27) LK Campbell, JR Thomas, LW Lamps, BR Smoller, AL Folpe Univ. of Arkansas for Medical Sciences, Little Rock, AR; Emory University, Atlanta, GA 20 Calponin and H-Caldesmon in Sarcomas of Myofibroblasts (36) C Fisher, JR Goldblum, E Montgomery Royal Marsden Hospital, London, United Kingdom; Cleveland Clinic, Cleveland, OH; The Johns Hopkins University, Baltimore, MD 21 Estrogen (ER) and Progesterone Receptor (PR) Expression in Uterine and Extra-Uterine Leiomyosarcomas (LMS): An Immunohistochemical Study (53) TW Kelley, E Borden, R Patel, A Prok, JR Goldblum Cleveland Clinic Foundation, Cleveland, OH 22 Estrogen Receptor $ (ER$) but Not ER" Is Expressed in Association with Nuclear Expression of $-Catenin in Deep and Superficial Fibromatoses (64) Y Nakatani, A Nozawa, K Kawachi, N Nakamura, J Sano, N Nakamura, S Yamanaka, Y Inayama, O Matsubara Yokohama City University Medical Center, Yokohama Citizen's Hospital, Hospital of Yokohama City University Yokohama, Japan; Yokohama Nanbu Hospital, Yokohama, Japan; National Defense Medical College, Tokorozawa, Saitama, Japan 23 Immunohistochemical Detection of FLI-1 Protein Using a Monoclonal Antibody (68) E Orvieto, L Laurino, S Chinellato, A Furlanetto, AP Dei Tos Regional Hospital, Treviso, Italy