A 2-year-old boy presents to the nurse practitioner with new onset seizures and a history of a port-wine stain at birth. Which of the following is not a clinical feature of Sturge-Weber syndrome (SWS)?

Sturge-Weber syndrome (SWS) is a rare disorder affecting the skin and nervous system

Symptoms of SWS may include seizures, muscle weakness, and developmental and intellectual disability

Treatment may include anti-seizure medications, medications and/or surgery for glaucoma, and low-dose aspirin to reduce the pressure in the eyes and brain

The prognosis for SWS is usually poor, with an average lifespan of 30 years