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Breast Invasive Ductal Carcinoma (IDC): Luminal B–like (ER+, PR low/neg or higher Ki-67; HER2– or HER2+)
Last reviewed: 9/15/2025
Summary
The most common invasive breast cancer. Biology-driven care hinges on ER/PR, HER2, Ki-67, nodal status, stage, and genomic assays.