@caredwards33 an oncotype score is one tool that is often used in determining whether or not chemo will be beneficial. But some doctors consider it unreliable. An oncotype test doesn't take into consideration the size of the tumor, for example. It only tests the genetic components. But it can add insight into what treatments will best help you. Ask your doctor if this test might be useful in your case.

@caredwards33
My understanding is that oncotype is only for early stage of breast cancer, ER+, HER2-
Your cancer is HER2+, so chemo is recommended. Have you decided on the treatments yet? Best wishes.