Penis, Epithelium - Hyperplasia

Image of epithelial hyperplasia in the penis from a male B6C3F1 mouse in a chronic study
Penis, Epithelium - Hyperplasia. Arrow indicates papillary proliferation of squamous epithelium in a male B6C3F1 mouse from a chronic study.
Figure 1 of 2
Image of epithelial hyperplasia in the penis from a male B6C3F1 mouse in a chronic study
Penis, Epithelium - Hyperplasia. Higher magnification of Figure 1 showing the hyperplastic squamous epithelium in a male B6C3F1 mouse from a chronic study.
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comment:

Hyperplasia of the mucosa is characterized by proliferation of squamous epithelium in the form of papillary folds (arrow, Figure 1image opens in a pop-up window ). It is an uncommon incidental finding and is unlikely to be associated with chemical administration.

recommendation:

This lesion should be diagnosed and given a severity grade.

references: