CNN US | How a DNA test solved a medical mystery – and revealed a doctor’s decades of deception

Summer McKesson struggled to breathe for years. Doctors told her it was because her blood would not stop clotting – and they couldn’t figure out why.

A single clot alone can be lethal; but the recurring and unexplained clots that formed in McKesson’s heart and lungs were a medical mystery.

After multiple surgeries to remove clots and scar tissue, McKesson traveled to the Mayo Clinic, where she sat in a conference room while renowned physicians and specialists worked through her case on a whiteboard.

But even they were baffled.   –read more–