Q: My son is suffering from cancer. He had a growth in his stomach three years back, which was surgically removed. There is another growth in his stomach, which is attached to his kidney and the doctors say that it is risky to operate so we are not operating it. We are giving some homeopathic medicines, and I would like to ask you if it is dangerous to check his growth by ultrasound? We used to check the growth every 6 months. Some say that it is dangerous to do an ultrasound every now and then. So let me know your opinion, is it dangerous or no?

A:Ultrasound as we know it today is completely free of side effects in the manner in which it is used. No other imaging technique is as safe as ultrasound.