Poorly functioning blood vessels lead to the characteristic muscle weakness that so many cancer patients experience. Artur Plawgo/Science Photo Library via Getty Images Tumors can destroy the blood ...

“Being frail” may not sound like that big of a deal—maybe you even assume it’s kind of inevitable as you get older. But frailty is actually a legitimate medical condition that can make it harder for ...

Duchenne muscular dystrophy (DMD) causes dysfunction of muscle cells that help move blood through the circulatory system, a ...

This autoimmune disorder affects how well your nerves and muscles communicate, leading to a variety of symptoms. Myasthenia gravis (MG) is a chronic autoimmune condition that affects signaling between ...