Hyperplasia -

This occurs when the lining of the uterus (the endometrium) becomes abnormally thick. Endometrial Hyperplasia - StatPearls - NCBI Bookshelf - NIH

Hyperplasia is generally divided into two main categories based on how the cells look under a microscope: hyperplasia

The cells look abnormal or "atypical." This is considered a precancerous condition and carries a significantly higher risk of progressing to cancer if left untreated. 1. Endometrial Hyperplasia (Uterus) This occurs when the lining of the uterus