Post-polio syndrome was first recognized and diagnosed in the 1980s, reports The New York Times. The disorder refers to signs and symptoms that develop decades after patients are originally diagnosed with polio, according to Mayo Clinic. On average, post-polio syndrome develops between 30 to 40 years after polio diagnosis.
Common symptoms of post-polio syndrome include muscle atrophy, fatigue, muscle and joint weakness, difficulty breathing or swallowing, and decreased tolerance of cold, states Mayo Clinic. In most patients, post-polio syndrome progresses very slowly.
To diagnose post-polio syndrome, doctors check for a previous diagnosis of polio and a long interval after recovery. Blood tests, muscle biopsy, electromyography and imaging tests can help rule out other disorders.