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Atypical ductal hyperplasia (ADH) is the term used for a benign lesion of the breast that indicates an increased risk of breast cancer. [1]The name of the entity is descriptive of the lesion; ADH is characterized by cellular proliferation (hyperplasia) within one or two breast ducts and (histomorphologic) architectural abnormalities, i.e. the cells are arranged in an abnormal or atypical way ...
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.
Atypical ductal hyperplasia is associated with a 2.4-fold risk. [20] In contrast, a New England Journal of Medicine article [ 21 ] states that for women with a strong familial history of breast cancer, the risk of future breast cancer is roughly doubled, independent of histological status.
Examples include atypical ductal hyperplasia, atypical lobular hyperplasia, and intraductal papillomas. References. External links. Benign ...
Like the cells of atypical lobular hyperplasia and invasive lobular carcinoma, the abnormal cells of LCIS consist of small cells with oval or round nuclei and small nucleoli detached from each other. [12] Mucin-containing signet-ring cells are commonly seen. LCIS generally leaves the underlying architecture intact and recognisable as lobules.
Hyperplasia of the breast – "Hyperplastic" lesions of the breast include usual ductal hyperplasia, a focal expansion of the number of cells in a terminal breast duct, and atypical ductal hyperplasia, in which a more abnormal pattern of growth is seen, and which is associated with an increased risk of developing breast cancer. [2]
The microscopic appearance of a nipple adenoma can be mistaken for carcinoma. [1] Other conditions that have similar symptoms and signs as nipple adenoma include Paget's disease of the breast, other intraductal papillomas, ductal carcinoma in situ (DCIS), syringomatous adenoma of the nipple and subareolar sclerosing duct hyperplasia.
There is some controversy as to whether these cancer cells travel through the ductal system of the breast to the nipple, [9] or whether these cells result from in situ malignant transformation. [ 2 ] The most widely accepted theory of how Paget's disease of the breast arises is the migratory theory: ductal carcinoma in situ cancerous cells ...