Dana-farber Cancer Institute

When Mike Johnston felt a lump in his chest in 2009, he assumed it was a side effect of a high blood pressure medication. But after a routine doctor's visit, followed by a mammogram and ultrasound, Johnston's diagnosis was confirmed: He had male breast cancer. Hear Johnston reflect on his diagnosis and treatment, including how friends and family reacted to the news and why he has become such a big breast cancer advocate today.