Digital Atlas of Breast Pathology by Meenakshi Singh, MD - Department of Pathology, Stony Brook University Medical Center

Invasive mammary carcinoma, combined histologic grade 2 of 3, Her 2 neu negative.
Moderately differentiated. Male breast carcinomas express Her 2 neu less frequently than female breast carcinomas. Note the lack of dark membranous staining.

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