Postatrophic hyperplasia (PAH)
In PAH the atrophic glands look darker than in partial atrophy. They are loosely grouped together in a lobular pattern. Sometimes there is a dilated feeder duct in the center of the lobule.
There is usually a mild chronic inflammation and the stroma often has a pale, degenerate or sclerotic appearance within each lobule. The nuclei may look dark but are small and monotonous. Nearby, there is often simple atrophy.
Dilated feeder ducts surrounded by smaller, dark glands and mild chronic inflammation.
PAH on needle biopsy with lobular groups of slit-like spaces.