The gene for LWS is most common in the American Paint Horse, but occurs in any breed that may carry frame genetics, including American Quarter Horses, Appaloosas, Thoroughbreds, Morgan Horses, Miniature Horses, Tennessee Walking Horses, and mustangs, as well as horses that are descended from these breeds. Only two Morgan horses have been identified as frame overos. Breeds that do not carry genes for the frame pattern also do not carry LWS.
Lethal white syndrome
Proteus-like syndrome
Toxic encephalopathy
Brain fag syndrome
Neotenic complex syndrome
Otodental syndrome
Brainstem death
Death-grip syndrome