There is a duality in recognising what an incredible disease it is - in terms of its origin, that it emerges out of a normal cell. It's a reminder of what a wonderful thing a normal cell is. In a very cold, scientific sense, I think a cancer cell is a kind of biological marvel.

Most days, I go home and I feel rejuvenated. I feel ebullient.

History repeats, but science reverberates.

If the history of medicine is told through the stories of doctors, it is because their contributions stand in place of the more substantive heroism of their patients.

Probably the most important reason we are seeing more cancers than before is because the population is ageing overall. And cancer is an age-related disease.

I began wondering, can one really write a biography of an illness? But I found myself thinking of cancer as this character that has lived for 4,000 years, and I wanted to know what was its birth, what is its mind, its personality, its psyche?

In 2005, a man diagnosed with multiple myeloma asked me if he would be alive to watch his daughter graduate from high school in a few months. In 2009, bound to a wheelchair, he watched his daughter graduate from college. The wheelchair had nothing to do with his cancer. The man had fallen down while coaching his youngest son's baseball team.