POSTER SESSION IV Tuesday, March 25, 2003   —  1:00 - 4:30 PM Exhibit Hall A - C DERMATOPATHOLOGY 46 Epidermolytic Acanthoma. A Study of 45 Cases (406) MA Giannotti, AC Alves, MJ Silva, O Giannotti Filho DASA - Diagnosticos da America S.A., Sao Paulo, Sao Paulo, Brazil 47 Changing Demographics and Pathology of Non-Melanoma Skin Cancer in the Last 30 Years (397) G Collins, N Nickoonahand, B Smoller, MB Morgan Universities of South Florida and Arkansas Colleges of Medicine, Tampa, FL and Little Rock, AR, Tampa, FL 48 P16INK4A Is a Sensitive and Specific Marker of Squamous Cutaneous Malignancies: An Evaluation of 203 Cases (445) ME Salama, MN Mahmood, HS Qureshi, C Ma, RJ Zarbo, AH Ormsby Henry Ford Health System, Detroit, MI 49 E-Cadherin Promoter Hypermethylation in Preneoplastic and Neoplastic Skin Lesions (396) MC Chiles, L Ai, CY Fan, BR Smoller University of Arkansas, Little Rock, AR; Central Arkansas Veterans' Healthcare System, Little Rock, AR 50 Increased 15-LOX-2 Immunostaining in Proliferative Dermatoses. Possible Role in Regulation of Keratinocyte Proliferation and Differentiation (456) AE Wilkerson, SJ Olson, DS Keeney, AR Brash, RN Page, SB Shappell Vanderbilt University Medical Center, Nashville, TN; Knoxville Dermatopathology Laboratory, Knoxville, TN; University of Tennessee Medical Center, Knoxville, TN 51 Promoter Hypermethylation of the Ataxia-Telangiectasia-Mutated (ATM) Gene in Normal, Dysplastic and Malignant Squamous Lesions of the Skin (403) C-Y Fan, Q Vo, L Ai, KD Brown, BR Smoller University of Arkansas for Medical Sciences, Little Rock, Arkansas and John L. McClellan Memorial Veterans' Hospital, Little Rock, AR; Stanley S. Scott Cancer Center, LSU Health Sciences Center, New Orleans, LA 52 Hypermethylation of Death Associated Protein Kinase (DAPK) and p16 Tumor Suppressor Genes in Actinic Keratosis and Squamous Cell Carcinoma (452) LN Tyler, A Lingbao, C Zuo, CY Fan, BR Smoller University of Arkansas for Medical Sciences; Central Arkansas Veterans Administration, John L. McClellan Memorial Veterans Administration Hospital, Little Rock, AR 53 ETS-1 Oncoprotein Expression and Prognosis in Primary Cutaneous Carcinomas (413) CA Keehn, BR Smoller, MB Morgan University of South Florida College of Medicine; University of Arkansas for Medical Sciences 54 Telomerase Activity, COX2, and p53 Are Useful Markers To Differentiate Keratoacanthoma from Squamous Cell Carcinoma (438) TC Putti, M Teh, YS Lee National University of Singapore, Singapore, Singapore 55 CD-106(VCAM) and CD-54(ICAM) Expression in Keratoacanthoma and Squamous Cell Carcinoma (427) N Melendez, BR Smoller, MB Morgan Universities of South Florida, Tampa, FL; Arkansas Colleges of Medicine, Little Rock, AR 56 Mutations of the $-Catenin Gene and Microsatellite Instability in Human Skin Adnexal Tumours (458) JT Zubovits, M Soares, M Redston Sunnybrook & Women's College Hospital and University of Toronto, Toronto, ON, Canada; University of Toronto, Toronto, ON, Canada; Brigham & Women's Hospital and Harvard Medical School, Boston, MA 57 HER2 Expression in Cutaneous Eccrine and Apocrine Neoplasms (408) KM Hiatt, JL Pillow, BR Smoller University of Arkansas for Medical Sciences, Little Rock, AR 58 $-Catenin Expression Patterns in Basal Cell Carcinomas and Trichoepitheliomas: Aberrations of the Developing Follicle (421) CA Lum, MA Arroyo, MM Thein, RK Brynes, SW Binder LAC-USC Medical Center, USC-Keck School of Medicine, Los Angeles, CA; UCLA Medical Center, UCLA-Geffen School of Medicine, Los Angeles, CA