POSTER SESSION IV Tuesday, March 1, 2005   —  1:00 - 4:30 PM Convention Center Exhibit Hall B BONE & SOFT TISSUE PATHOLOGY 1 Array-CGH Analysis of Conventional Central Chondrosarcomas Points to Chromosome 6 and 12 Involvement in Tumor Progression (82) LB Rozeman, K Szuhai, JVMG Bové, C Rosenberg, HJ Tanke, PCW Hogendoorn - Leiden University Medical Center, Leiden, Netherlands 2 cDNA Microarray Analysis of Conventional Central Chondrosarcomas Identifies Genes Associated with Tumor Progression, Not Related to Ollier Disease (83) LB Rozeman, L Hameetman, T van Wezel, AM Cleton-Jansen, PCW Hogendoorn, JVMG Bové - Leiden University Medical Center, Leiden, Netherlands 3 EXT-Related Pathways Are Not Involved in Pathogenesis of Dysplasia Epiphysealis Hemimelica and Metachondromatosis (54) L Hameetman, PCW Hogendoorn, HM Kroon, T Aigner, JVMG Bovée - Leiden University Medical Center, Netherlands; University of Erlangen-Nurnberg, Germany 4 Loss of EXT Expression Causes Downregulation of IHh Signaling in Hereditary and Solitary Osteochondromas (52) L Hameetman, AM Cleton-Jansen, AHM Taminiau, PCW Hogendoorn, JVMG Bovée - Leiden University Medical Center, Leiden, Netherlands; 5 Progression of Secondary Peripheral Chondrosarcoma Is Characterized by Downregulation of Oxidative Phosphrylation Genes (53) L Hameetman, AM Cleton-Jansen, LB Rozeman, M Lombaerts, AHM Taminiau, JVMG Bovée, PCW Hogendoorn - Leiden University Medical Center, Leiden, Netherlands 6 Estrogen Signaling Is Active in Chondrosarcoma; Implications for Anti-Estrogens as Treatment of Chondrosarcoma (39) AM Cleton-Jansen, HM Van Beerendonk, JV Bovee, K Szuhai, M Karperien, PC Hogendoorn - LUMC, Leiden, Netherlands 7 TGF-ß1 Drives Partial Myofibroblastic Differentiation in Chondromyxoid Fibroma (81) S Romeo, B Eyden, F Prins, I Briaire-De Bruijn, AHM Taminiau, PCW Hogendoorn - LUMC, Leiden, Netherlands; Christie Hospital NHS Trust, Manchester, United Kingdom 8 Amplifications of CDK 4 and MDM 2 Genes in Epithelioid Sarcomas Detected by Array-Based Comparative Genomic Hybridization and Fluorescence In Situ Hybridization (63) L Lin, B Xu, J Pettay, WF Bergfeld, M Skacel, D Hicks, RR Tubbs, JR Goldblum - The Cleveland Clinic Foundation, Cleveland, OH 9 Lipoblastoma in Adolescents and Young Adults: Report of 6 Cases with Fluorescence In Situ Hybridization Analysis (41) N de Saint Aubain Somerhausen, JM Coindre, M Debiec-Rychter, J Delplace, R Sciot - Jules Bordet Institute, Brussels, Belgium; Bergonie Institute, Bordeaux, France; Catholic University of Leuven, University Hospital St. Rafael, Leuven, Belgium; Centre Pathologie Liberte, Lille, France 10 Irradiation of Myxoid and Round Cell Liposarcoma Induces Growth Arrest and Lipogenic Maturation (67) JM Meis-Kindblom, K Engstrom, P Aman, C-G Cederlund, P Bergh, L-G Kindblom - Sahlgrenska University Hospital (SUH), Gothenburg, Sweden 11 Myosarcomatous Differentiation in Dedifferentiated Liposarcomas Does Not Increase the Risk of Metastatic Dissemination. Comparative Study between Conventional Dedifferentiated Liposarcomas (CDLPS), Dedifferentiated Liposarcomas with Divergent Myosarcomatous Differentiation (DLPS-MS), and Pure Leiomyosarcomas (LMS) of Retroperitoneal and Paratesticular Regions (40) JM Coindre, L Guillou, I Hostein, MC Chateau, E Stoeckle, BN Bui, A Aurias - Institut Bergonie, Bordeaux, France; CHUV, Lausanne, Switzerland; Centre Val d'Aurelle, Montpellier, France; Institut Bergonie, Bordeaux, France; Curie, Paris, France 12 The Prognostic Significance of Fibrosarcoma Arising in Dermatofibrosarcoma Protuberans (30) JJ Abbott, AM Oliveira, AG Nascimento - Mayo Clinic, Rochester, MN 13 Angiostatin Receptor Annexin II in Vascular Tumors (86) SP Syed, AM Martin, CP Arenas-Elliot, JJ Brooks - Pennsylvania Hopsital, Univ of Penn. Health System, Philadelphia, PA 14 Palmar-Plantar Fibromatosis in Children and Preadolescents: A Clinicopathologic Study of 56 Cases with Long-Term Follow-Up (47) JF Fetsch, W Laskin, M Miettinen - AFIP, Washington, DC; Northwestern Univ., Chicago, IL 15 Soft Tissue Perineurioma: Analysis of 81 Cases Including Examples with Atypical Histologic Features (57) JL Hornick, CD Fletcher - Brigham & Women's Hospital; Harvard Medical School, Boston, MA 16 Diffuse Malignant Mesothelioma of the Peritoneum: A Clinicopathologic Study of 35 Cases (71) D Nonaka, S Kusamura, D Baratti, P Casali, M Derac - National Cancer Institute, Milan, Italy 17 Hemangiomas of Bone Previously Misclassified as Hemangioendothelioma (36) F Bertoni, C Inwards, P Bacchini, D Mellano - Rizzoli Institute, Bologna, Italy; Mayo Clinic, Rochester, MN 18 Epithelioid Hemangioendothelioma of Bone - The Rizzoli Experience (35) F Bertoni, C Inwards, P Bacchini, D Mellano - Rizzoli Institute, Bologna, Italy; Mayo Clinic, Rochester, MN 19 Histopathologic Abnormalities in Specimens from Orthopedic Spine Surgeries (79) P Pytel, RL Wollmann, AG Montag - University of Chicago Hospitals, Chicago, IL 20 Usefulness and Limitations of Core Biopsy in the Diagnosis and Management of Musculoskeletal Tumors and Pseudotumors. A Multidisciplinary Approach in 136 Cases (64) JI López, JL del Cura, L Oleaga, C ValDés, FJ Bilbao - Hospital de Basurto, Basque Country University (UPV/EHU), Bilbao, Bizkaia, Spain 21 Immunohistochemical and Electron Microscopical Evidence That the Non-Osteoblastic Components in Osteoid Osteoma and Osteoblastoma Are Similar and Distinctive (65) DC Mangham, VP Sumathi, J McClure, PW Cool, VC Pullicino, AM Davies - Robert Jones & Agnes Hunt Orthopaedic Hospital NHS Trust, Oswestry, Shropshire, United Kingdom; Royal Orthopaedic Hospital, Birmingham, West Midlands, United Kingdom 22 Angiomatoid Fibrous Histiocytoma of Bone (85) ML Spencer, AG Ayala, HD Dorfman, B Czerniak - The University of Texas M D Anderson Cancer Center, Houston, TX; The Methodist Hospital, Houston, TX; Montefiore Medical Center, New York, NY 23 Malignant Fibrous Histiocytoma of Bone Revisited: Immunhistochemical Analysis of 29 Cases (43) AT Deyrup, KK Unni, AG Monta - Emory University, Atlanta, GA; Mayo Clinic, Rochester, MN; The University of Chicago, Chicago, IL 24 Epstein-Barr Virus-Associated Smooth Muscle Tumors (EBVSMT): A Distinctive Smooth Muscle Tumor Associated with Multiple Infection Events (42) AT Deyrup, CE Hill, W Cheuk, V Lee, SW Weiss - Emory University, Atlanta, GA; Singapore General Hospital, Singapore, Singapore; Queen Elizabeth Hospital, Hong Kong, China 25 Dedifferentiated Leiomyosarcoma; Clinicopathologic Analysis of 8 Cases (72) FP O'Connell, CDM Fletcher - Brigham and Women's Hospital and Harvard Medical School, Boston, MA 26 Subcutaneous Leiomyosarcoma in Children: A Clinicopathologic Study with Emphasis on Biologic Behavior (46) JC Fanburg-Smith, CM Coffin, M Miettinen - AFIP, Washington, DC; Primary Children's Medical Center, Salt Lake City, UT