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Jan 29, 2019 09:51AM
Ms_Anthrope, you are in the correct forum.
Your tumor appears to be DCIS-Mi, DCIS with a microinvasion. Microinvasions are IDC, just very tiny - by definition, a microinvasion is no larger than 1mm in size. Some people (like me) have just one microinvasion mixed in with their DCIS; other people have several. It appears that you have several.
DCIS-Mi is not the same as DCIS. DCIS is Stage 0; DCIS-Mi is Stage IA. It is the smallest possible invasive cancer.
Because it is invasive cancer, although rare, it can lead to nodal involvement and lympho-vascular invasion. With micromets to the nodes, the staging changes to Stage IB.
Normally the treatment of of DCIS-Mi is the same as the treatment for DCIS, but this can change if the microinvasion is HER2+ or if there is nodal involvement, as in your case. In those situations, DCIS-Mi tends to be treated as any other small invasive cancer.
Dx 9/15/2005 Right, 7cm+, DCIS-Mi, Stage IA, Gr 3, 0/3 nodes, ER+/PR- ** Dx 01/16/2019 Left, 8mm, IDC, Stage IA, Gr 2, 0/3 nodes, ER+/PR-, HER2- (FISH) ** Surgery 11/30/2005 MX Right, 03/06/2019 MX Left ** Hormonal Therapy 05/2019 Letrozole