POSTER SESSION II Monday, March 8, 2004   —  1:00 - 4:30 PM Exhibit Hall B and C PEDIATRIC PATHOLOGY 169 CpG Island Methylation Is Present in a Large Percentage of Colonic Juvenile Polyps from Pediatric Patients (1381) R Broaddus, S-S Xie, M Finegold - University of Texas M.D. Anderson Cancer Center, Houston, TX; Texas Children's Hospital, Houston, TX 170 b-Catenin Nuclear Staining Distinguishes Myofibromas/Myofibromatoses from Deep Fibromatoses (1391) E Montgomery, HP Dilworth, M Furlong, C Fisher, B Bhattacharya - The Johns Hopkins Hospital, Baltimore, MD; Georgetown University, Washington, DC; Royal Marsden Hospital, London, United Kingdom 171 Proliferation Markers, Chemokine Receptor and Tumor Suppressor Gene Expression in Alveolar and Embryonal Rhabdomysarcoma (1386) J Hicks, A Rosolen, H Russell, J Shohet - Texas Children's Hospital & Baylor College of Medicine, Houston, TX; University of Padua, Padua, Italy 172 A Comparison of Two New Classifications of Pediatric Myelodysplastic/Myeloproliferative Diseases (1392) EA Occhipinti, H Correa, RD Craver - Louisiana State University School of Medicine, New Orleans, LA 173 Th1 and Th2 Differentiation in Pediatric Anaplastic Large Cell Lymphoma (1384) JC Ford, A Perez-Atayde, BG Massing, A Shahsafaei, DM Dorfman - Children's & Women's Health Centre of B.C., Vancouver, BC, Canada; Beth Israel Deaconess Medical Center, Boston, MA; Children's Hospital, Boston, MA; Brigham & Women's Hospital, Boston, MA; University of British Columbia, Vancouver, BC, Canada; Harvard Medical School, Boston, MA 174 Expression of Cancer Testis (CT) Antigens MAGE-A1, -A3, A4, NY-ESO-1, and CT-7 (MAGE-C1) in Placenta (1387) AA Jungbluth, K Iversen, D Kolb, YT Chen, M Vogel - New York Branch, Ludwig Institute for Cancer Research, New York-Presbyterian Hospital and Weill Medical College, New York, NY; Virchow Hospital, Charité, Berlin, Germany 175 Immunohistochemical Characterization of Placental Vascular Intimal Cushions: Evidence Against Etiologic Organizing Thrombi (1383) SC Emery, K Benirschke - University of California San Diego Medical Center, San Diego, CA 176 Peroxisome Proliferator Activated Receptor Gamma (PPAR-g) Is Down Regulated in Trophoblasts in Pre-Eclampsia (1394) ZN Singh, M Tretiakova, T Krausz, AN Husain - University of Chicago, Chicago, IL 177 Chronic Intestinal Pseudo-Obstruction in Children (1393) MM Rodriguez, RL Romaguera, JH Bruce, N Mittal, C Loynaz, T Kato - University of Miami/Jackson Memorial Hosp., Miami, FL 178 Pediatric Deaths: A Coroner's Based Review (1389) SA Koehler, S Ladham, L Rozin, A Shakir, B Omalu, J Dominick, CH Wecht - Allegheny County Coroner's Office, Pittsburgh, PA