mammary atypical ductal hyperplasia

Synopsis

• 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.