Autism research finds Phelan-McDermid syndrome may affect 1 in 7,300 people: More common than previously thought

MedicalXpress | Jul 09, 2026

New research, led by scientists from the Seaver Autism Center for Research and Treatment at Mount Sinai and published in Autism Research, has estimated that Phelan-McDermid syndrome (PMS) affects approximately 1 in 7,300 people, making it far more common than previous estimates suggested.