Kidney, Renal Tubule - Atypical Tubule Hyperplasia - Gallery

Kidney, Renal tubule - Atypical tubule hyperplasia in a male F344/N rat from a chronic study. Atypical tubule hyperplasia is confined to one tubule and is characterized by an increase in cellularity and cell size, cytoplasmic basophilia, nuclear enlargement, and circumferential expansion.