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Representative images of moderate-grade prostatic intraepithelial neoplasia (lesion grade 2) in transgenic adenocarcinoma of the mouse prostate. Note the more prominent papillary projections of hyperplastic epithelial cells that project into the lumen in the dorsal (A, hematoxylin and eosin [H&E], 200×) and ventral lobes (B, H&E, magnification 100×).
