Editorial: Whither HER2-Related Therapeutics? (breast cancer) -- Journal of Clinical Oncology

Note: references to solid tumours

"Evidence suggests that most solid tumors, regardless of their type, cannot grow beyond approximately 1 mm3 until they establish a blood supply by inducing new blood vessels from existing host capillaries, called tumor-induced angiogenesis......It follows then that tumor cells with low HER3 mRNA are more likely to respond to pertuzumab, given that these are the cells where the pathway is activated. We would conjecture that this signature does not apply exclusively in ovarian cancer, but may also be found in other solid tumors, such as non–HER2-positive breast, colorectal, and so on."