Email this page To: From: Subject: Message: Why chemo - Why do doctors give chemo to kids who have cancer? The reasons include shrinking a tumor before surgery, killing cancer cells that spread and helping a child feel better. - https://www.stjude.org/treatment/disease/solid-tumors/treatment/chemotherapy/why-chemo.html A summary of this page will be sent along with your message I am a referring physician Yes, I would like to receive email updates. Send Email Your message has been emailed successfully. Thank you for your interest in St. Jude Children's Research Hospital.