POSTER SESSION V Wednesday, March 10, 2004   —  9:30 AM - 12:00 Noon EXHIBIT HALL B and C BONE AND SOFT TISSUE PATHOLOGY 1 An Immunohistochemical Study of Fibrous Hamartoma of Infancy with Focus on Giant Cell Fibroblastoma-Like Areas (56) L Lin, JD Reith, WF Bergfeld, JE Sigel, JR Goldblum - Cleveland Clinic Foundation, Cleveland, OH; University of Florida, Gainesville, FL; Cleveland Skin Pathology, Cleveland, OH 2 Hemosiderotic Fibrohistiocytic Lipomatous Tumor (So-Called): Validation of a Distinct Entity (33) T-J Browne, CD Fletcher - Brigham and Women's Hospital and Harvard Medical School, Boston, MA 3 Immunohistochemical Staining for Calretinin Is Useful in Differentiating Neurofibromas from Schwannomas (39) SW Fine, SA McClain, M Li - Montefiore Medical Center/Albert Einstein College of Medicine, Bronx, NY 4 Nerve Sheath Tumors with Hybrid Features of Perineurioma and Schwannoma (34) EA Bundock, CDM Fletcher - Brigham and Women's Hospital and Harvard Medical School, Boston, MA 5 Chondroblastic Osteosarcoma: Effect of Histologic Grade (38) LG Dodd - Duke University Medical Center, Durham, NC 6 Do Patients Surviving Osteosarcoma Differ from Those Who Don't? (43) RL Gaffney, KK Unni, MH Cheng, FH Sim, J Slezak, ME Bolander - Mayo Clinic, Rochester, MN 7 Prognostic Factors in Osteosarcoma: A Study of 648 Patients (26) PM Arnell, HJ Mankin, MC Gebhardt, FJ Hornicek, D Harmon, GP Nielsen, AE Rosenberg - Massachusetts General Hospital, Boston, MA 8 Soft Tissue Angiomatosis: A Clinicopathologic Study of 14 Cases (67) D Walsh, TJ Bocklage, J Hozier, A Chakerian, B Hall - University of New Mexico, Albuquerque, NM 9 Pleomorphic Hyalinizing Angiectatic Tumor (PHAT): Report of 42 Cases with Emphasis on Early Tumors (41) AL Folpe, SW Weiss - Emory University, Atlanta, GA 10 Histiocytic Sarcoma: A Study of 13 Extranodal Cases (51) JL Hornick, ES Jaffe, CDM Fletcher - Brigham and Women's Hospital, Harvard Medical School, Boston, MA; National Cancer Institute, Bethesda, MD 11 Clinical and Biologic Significance of MyoR mRNA Expression in Rhabdomyosarcoma, a Tissue Microarray Study (48) AE Heerema, SC Linn, S Zhu, M van de Rijn - Stanford University, Stanford, CA 12 Superficial Low-Grade Fibromyxoid Sarcoma: An Analysis of 19 Cases (32) SD Billings, G Giblen, JC Fanburg-Smith - Indiana University, Indianapolis, IN; Georgetown University, Washington, DC; Armed Forces Institute of Pathology, Washington, DC 13 Nuclear b-Catenin Expression Distinguishes Deep Fibromatoses from Low-Grade Fibromyxoid Sarcomas (31) B Bhattacharya, HP Dilworth, C Fisher, EA Montgomery - The Johns Hopkins Hospital, Baltimore, MD; Royal Marsden Hospital, London, United Kingdom 14 A Survey of Aberrant B-Catenin Expression in Sporadic Fibromatosis Occuring at Different Anatomical Sites (59) S Musunuri, M Policarpio-Nicolas, SM Rao - The Feinberg School of Medicine, Northwestern University, Chicago, IL 15 Beta-Catenin Nuclear Immunoreactivity for Differential Diagnosis of Desmoid Tumors (65) VB Shidham, RN Rao, CC Chang, B Susnik, R Komorowski, A Chavan - Medical College of Wisconsin, Milwaukee, WI; Baylor College of Medicine, Houston, TX 16 Cytoplasmic hMLH-1 Immunoreactivity in Gastrointestinal Stromal Tumor (GIST) (71) S Yuan, PE Swanson - University of Washington Medical Center, Seattle, WA 17 Dedifferentiated Central Chondrosarcoma (DCCHS): A Clinicopathologic and Radiologic Study of 131 Cases (29) F Bertoni, CY Inwards, P Bacchini, E Staals - Rizzoli Institute, Bologna, Italy; Mayo Clinic, Rochester, MN 18 Dedifferentiated Peripheral Chondrosarcoma (DPCHS) (28) F Bertoni, CY Inwards, P Bacchini, E Staals - Rizzoli Institute, Bologna, Italy; Mayo Clinic, Rochester, MN 19 Dedifferentiated Parosteal Osteosarcoma (DPOS): A Clinicopathologic and Radiologic Study of 20 Cases (30) F Bertoni, CY Inwards, P Bacchini, E Staals - Rizzoli Institute, Bologna, Italy; Mayo Clinic, Rochester, MN 20 Malignant Solitary Fibrous Tumor: A Transformation and Dedifferentiation Phenomenon in Some Cases (73) PJ Zhang, JJ Brooks - University of Pennsylvania Medical Center, Philadelphia, PA