After my breast cancer surgery, the factors which indicate whether I would benefit from chemotherapy were inconclusive. There was one further test available. The Oncotype DX test examines the activity of 21 genes in the tumour tissue of patients with early-stage oestrogen-receptor-positive (ER+) invasive breast cancer and calculates whether chemo will be effective or not.
My score was low (14/100), and so, like many others since this test was developed a few years ago, I do not have to go through the puking, hair-losing agonies of fighting cancer by throwing poisons at it. So far, so good.
So, what’s the catch? My tumour had to be sent to the USA to be tested. This took a few weeks, which delayed the start of my radiotherapy, reducing its effectiveness of in preventing the cancer returning. Radiotherapy is supposed to start within six weeks of surgery; mine started twelve weeks after. Only time will reveal the impact of this delay – but it could mean that my cancer comes back when it would not have done so otherwise.