Lung - Atypia Cellular - Gallery

Lung, Bronchiole - Hyperplasia, Atypical in a female B6C3F1/N mouse from a subchronic study. The atypical cells have enlarged, hyperchromatic nuclei (arrows) and an increased nuclear to cytoplasmic ratio.

Lung, Alveolar epithelium - Atypia, Cellular in a male B6C3F1/N mouse from a subchronic study. Atypical cells (arrows) have enlarged nuclei and may be binucleated.