POSTER SESSION I Monday, March 24, 2003   —  9:30 AM - 12:00 Noon Exhibit Hall A - C BONE AND SOFT TISSUE PATHOLOGY 14 Expression Profiling of Fibromatosis by cDNA Gene Array Analysis (28) L Cheng, RB West, S Zhu, SC Linn, TO Nielsen, 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 15 Metastatic Retroperitoneal (RP) Dedifferentiated Liposarcomas (DLS) Are Rapidly Fatal: 6 Cases with Emphases on Unusual Spread to Soft Tissue and the Low-Grade Myxofibrosarcoma-Like Pattern as an Early Sign of Dedifferentiation (48) H-Y Huang, MF Brennan, CR Antonescu Memorial Sloan-Kettering Cancer Center, New York, NY; Chang Gung Memorial Hospital, Kaoshiung, Taiwan 16 Notochordal Hamartoma and Its Necessary Distinction from Chordoma (54) JA Knapik, R Vlasak, JD Reith University of Florida, Gainesville, FL 17 Immunohistochemical Evaluation of Mitf Expression in Giant Cell Lesions (74) RR Seethala, JR Goldblum, M Lehman, JS Khurana, TL Pasha, PJ Zhang University of Pennsylvania Medical Center, Philadelphia, PA; Cleveland Clinic Foundation, Cleveland, OH; Temple University, Philadelphia, PA 18 Primary Lymphoma of Bone: A Clinicopathologic Study of 15 Cases (76) SL Wu DK McGregor, LJ Medeiros, AK Raymond, MT Deavers University of Texas M.D. Anderson Cancer Center, Houston, TX 19 Aberrant Promoter Methylation of HIC-1 in Human Pleomorphic Sarcoma (77) B Yang, M Guo, R Patel, W Chen, DP Clark, JG Herman, JR Goldblum Johns Hopkins Medical Institutions, Baltimore, MD; Cleveland Clinic Foundation, Cleveland, OH