I. Non-Proliferative*
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Non-Proliferative only
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Fibroadenoma
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II. Proliferative changes without atypia
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Usual ductal hyperplasia
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Columnar cell hyperplasia/columnar cell changes
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Sclerosing adenosis
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Radial Scar/complex sclerosing lesion
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Flat epithelial atypia
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Intraductal papilloma w/o atypia
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III. Atypical ductal hyperplasia (ADH)
|
Atypical ductal hyperplasia
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Intraductal papilloma with atypia
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IV. Ductal carcinoma in situ (DCIS)
|
Ductal carcinoma in situ
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V. Invasive breast cancer
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Invasive (ductal or lobular or other special type)
|