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American Journal of Pathology, Vol 145, 1337-1348, Copyright © 1994 by American Society for Investigative Pathology
REGULAR ARTICLES |
SS Bacus, CR Zelnick, DM Chin, Y Yarden, DB Kaminsky, J Bennington, D Wen, JN Marcus and DL Page
Advanced Cellular Diagnostics, Elmhurst, Illinois 60126.
The histological hallmarks for the diagnosis of medullary breast cancer are circumscription, syncytial architecture, diffuse inflammatory infiltrate, and highly atypical nuclei. The biological and prognostic implication is a lower propensity to metastasize. We studied 19 medullary carcinomas for expression of the intercellular adhesion molecule-1 and lymphocyte-function-associated antigen-1, Neu differentiation factor, tumor necrosis factor-alpha, and the expression of HER-2/neu, HER-4, and HER-3 receptors. Our study revealed that all of the 19 medullary carcinomas expressed the intercellular adhesion molecule-1 and lymphocyte function associated antigen. Eighteen of 19 cancers expressed Neu differentiation factor and tumor necrosis factor- alpha. All medullary cancers expressed the HER-2/neu receptor, however, in the majority of the cases, the staining was confined to the cytoplasm. Only 4 of 12 cancers expressed HER-4 and none of the eight medullary cancers tested expressed HER-3. By comparison, in a control group of infiltrating ductal carcinomas, expression of intercellular adhesion molecule-1, lymphocyte function associated antigen-1, and Neu differentiation factor was positive in about 25 to 30% of the cases, HER-4 was expressed in 75% and HER-3 in 95% of the cases. Taken together, our observations suggest that the expression of intercellular adhesion molecule-1, lymphocyte function associated antigen, Neu differentiation factor, and tumor necrosis factor-alpha as factors that may affect the special morphology and the biological behavior that characterizes medullary carcinomas.
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