The 84-year-old man arrived in the emergency room with complaints that weren’t uncommon for a patient his age.
He had reported feeling unsteady over the past several months, culminating in repeated falls in recent weeks. In the three days leading up to his hospital visit, his left arm and leg had noticeably weakened.
Still, there were no red flags in the man’s medical history. He didn’t smoke. He rarely drank. A blood test detected nothing abnormal.
“There was no…