Normally, HER2 helps your healthy breast cells grow and divide. But too much HER2 can trigger cells to grow out of control. HER2-positive breast cancer happens when the HER2 gene in your DNA mutates ...

Microscopy image of invasive breast cancer cells (labelled in yellow) degrading their underlying extracellular matrix (labelled gelatin in red, degraded areas appear as black holes). Scale bar, 20µm.

Jenna Fischer, former star of The Office, was diagnosed with stage I triple-positive breast cancer last year. (Mario Anzuoni/Reuters) After announcing earlier this month that she was diagnosed late ...

Hormone receptor (HR)–positive metastatic breast cancer is a type of breast cancer that has metastasized (spread) beyond the breast to other areas of your body. Metastatic breast cancer is also called ...

Jenna Fischer, who starred in "The Office," said Tuesday that she underwent surgery and treatment for breast cancer earlier this year and is now "cancer free." Fischer, 50, wrote in an Instagram post ...

HER2-positive breast cancer is driven by HER2 protein overexpression, historically linked to poor outcomes but now improved by targeted therapies. Treatment varies by stage, involving surgery, ...

Pfizer's oncology portfolio has produced a second positive phase 3 trial in HER2-positive breast cancer in the span of about a year. This time, the drug that delivered the positive readout is Tukysa, ...