- Intellectual disability of varying degrees (97%)
- Autism (75%)
- Autistic features (84%)
- Hypotonia (~100%)
- Gait disturbance (94%)
NOTE – This list is meant to introduce you to common features of Phelan-McDermid Syndrome. It is a not a comprehensive list and is not intended to guide your medical care. Please consult your physician for specific health care questions.