POSTER SESSION I Monday, March 24, 2003   —  9:30 AM - 12:00 Noon Exhibit Hall A - C PATHOBIOLOGY 198 Transitional Cell Tumors of the Ovary and Transitional Cell Carcinomas of the Bladder Are Immunophenotypically Different Neoplasms (1346) P Cho, RS Saad, YL Liu, J Seski, MY Tung, DA Potonia, JF Silverman Allegheny General Hospital, Pittsburgh, PA 199 GATA-4 and GATA-6 Expression in Ovarian Surface Epithelial Neoplasms (1358) MD McEachin, X-X Xu, G Cotsonis, D Lawson, C Cohen Emory University School of Medicine, Atlanta, GA; Fox Chase Cancer Center, Philadelphia, PA; Emory University, Atlanta, GA 200 Wnt Pathway Abnormalities in Synovial Sarcoma (SS): An Immunohistochemical Study of Wnt-1, b-Catenin, Axin, APC, and GSK-3bproteins (1366) AC Popp, D Jaye, SW Weiss, C Fisher, AL Folpe Emory University, Atlanta, GA; Royal Marsden Hospital, London, United Kingdom