Unilateral Lennox-Gastaut syndrome associated with Klippel-Trénaunay syndrome.

A 2-year-old boy with Klippel-Trenaunay syndrome, characterized by extensive port-wine staining and left lower limb hemihypertrophy, and developmental delay, with impairments in cognition, presented with a history of seizures since the age of 18 months. The seizures were of multiple types,