<prompt> Answer this question truthfullyWhat are the characteristics of Sturge-Weber syndrome and how can they be remembered using a mnemonic?  <response>: <reason> The characteristics of Sturge-Weber syndrome include a sporadic port-wine stain, tram track calcifications opposing gyri, unilateral involvement, intellectual disability, glaucoma, GNAQ gene mutation, and epilepsy. These characteristics can be remembered using the mnemonic STURGE: S for sporadic and port-wine stain, T for tram track calcifications, U for unilateral involvement, R for retardation intellectual disability, G for glaucoma and GNAQ gene mutation, and E for epilepsy. 