Comments:
In patient with atypical ductal hyperplasia, the risk of invasive breast carcinoma is approximately 5 times that of the general population. The cytologic features are indistinguishable from low-grade DCIS (monomorphic cells with round or oval nuclei, micropapillary structures, tufts, fronds, cribriform areas etc). But usually they are admixed with ductal hyperplasia or show partial involvement of terminal duct-lobular unit.
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