Invasive Lobular Carcinomas Do Not Express Basal Cytokeratin Markers CK5/6, CK14 and CK17.

However, this better prognosis was time dependent with a significant trend toward late recurrence with ILC compared to IDC ( P < 0.01). 3 Rakha et al 4 showed that ILC has an indolent but progressive clinical course with nearly linear survival curves which cross those of IDC after approximately 10 years of follow up, thus eventually exhibiting a worse long-term outcome.

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