POSTER SESSION III Tuesday, March 9, 2004   —  9:30 AM - 12:00 Noon Exhibit Hall B and C ULTRASTRUCTURAL PATHOLOGY 202 Immunohistochemical Heterogeneity of Gastrointestinal Stromal Tumors May Impact on Proper Classification (1541) GA Herrera, A Li, ML Nordberg, ML Jones, EA Turbat-Herrera - LSU Health Sciences Center, Shreveport, LA; Feist-Weiller Cancer Center, Shreveport, LA 203 Differentiation of Gastrointestinal Stromal Tumors: Ultrastructural Study of 52 Cases (1549) L Wu, X Sun, Q Liu - Changhai Hospital, Second Military Medical University, Shanghai, China 204 Dermatofibroma and Dermatofibrosarcoma Protuberans. A Comparative Ultrastructural Study (1540) HR Dominguez-Malagon, MC Valdez Carrillo, AM Cano-Valdez - Instituto Nacional de Cancerologia, Mexico City, D.F, Mexico 205 Adrenocortical Tumors in Children: Immunocytochemical and Ultrastructural Study (1543) J Hicks - Texas Children's Hospital & Baylor College of Medicine, Houston, TX 206 Role of b-2 Integrins in Murine Lupus Glomerulonephritis (1542) J Hicks, C Kevil, T Schoeb, D Bullard - Texas Children's Hospital & Baylor College of Medicine, Houston, TX; Louisiana State University Medical Center, Shreveport, La; University of Alabama at Birmingham, Birmingham, AL 207 The Diagnostic Utility of Ultrastructural Evaluation of Formalin-Fixed Paraffin-Embedded Tissue from Chromophobe Renal Cell Carcinoma (1548) JJ Tu, S Seshan, SK Tickoo - WMC of Cornell University, New York, NY 208 Ultrastructural and Immunohistochemical Study of FNA Biopsies of Hepatic Metastatic Epithelial Tumors of Uncertain Origin (1551) G-Y Yang, G Sidhu, N Cassai, R Wieczorek - New York Universitry School of Medicine, and New York VA Hospital, New York, NY 209 Mesothelioma with a Pronounced Myxoid Stroma: A Comprehensive Clinical and Pathological Evaluation (1546) J Shia, J Qin, RA Erlandson, P Illei, J Nobrega, D Yao, DS Klimstra - Memorial Sloan-Kettering Cancer Center, New York, NY 210 Analysis of Foreign Material Identified in Non-Neoplastic Lung Tissue with Energy-Dispersive X-Ray (1544) AG Kahn, G Farooqui, JAC King - University of South Alabama, Mobile, AL 211 Ultrastructural Pathology of the Lung in SHIV-Infected Rhesus Monkeys (1539) LV Asher, NJ Bryant, J Mascola, C Carpenter, C Hanson - Walter Reed Army Institute of Research, Silver Spring, MD 212 Immunoelectron Microscopic Study of Anatomical Structures Targeted by Melanoma Vaccine-Induced Antibodies (1547) PY Sun, SR Reynolds, ND Cassai, JC Bystryn, GS Sidhu - NYU School of Medicine, NY, NY