Atypical hyperplasia


Atypical hyperplasia is a benign cellular hyperplasia in which cells show some atypia. In this condition, cells look abnormal under a microscope and are increased in number.

By organs

Breast

Atypical hyperplasia is a high-risk premalignant lesion of the breast. It is believed that atypical ductal hyperplasia is a direct precursor for low-grade mammary ductal carcinoma, whereas atypical lobular hyperplasia serves as a risk indicator.