Atypical hyperplasia
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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
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- [http://www.cancer.gov/dictionary?CdrID=46522 Atypical hyperplasia] entry in the public domain NCI Dictionary of Cancer Terms
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