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

Florid ductal hyperplasia involving a papilloma
Proliferating epithelial cells fill the spaces between the fibrovascular cores. The epithelial cells are arranged in a haphazard pattern, and in some areas the nuclei line up in parallel creating a "streaming" pattern.

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