Atypical hyperplasia is a benign (noncancerous) 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 (ADH) is a direct precursor for low-grade mammary ductal carcinoma, whereas atypical lobular hyperplasia (ALH) serves as a risk indicator.

References

• Atypical hyperplasia entry in the public domain NCI Dictionary of Cancer Terms

 This article incorporates public domain material from Dictionary of Cancer Terms. U.S. National Cancer Institute.

This oncology article is a stub. You can help Wikipedia by expanding it.

• v
• t
• e