Marjorie McFadden is not your typical 90-year-old. McFadden retired from her public-school job at the age of 85 and remained very social afterwards, regularly attending social gatherings and playing bingo and pinochle with friends. A condition called achalasia, an unusual tightening of the muscles at the lower end of the esophagus, changed all of that, and McFadden found herself unable to swallow food or water and losing a pound of weight a day. But an innovative procedure at Stanford - the per oral endoscopic myotomy, or POEM - now means McFadden is back to enjoying social gatherings again. Her story is captured in the Stanford Hospital video above.