We have reported long-term clinical follow-up for two siblings with Lafora
disease, a brother and sister, one of whom autopsied. Both siblings had rep
eated attacks of severe myoclonus, tonic and tonic-clonic convulsions, and
intractable status epilepticus. The addition of orally administered zonisam
ide brought about striking effective seizure control for about 12-14 years
in both patients, relieving not only myoclonus and generalized tonic-clonic
seizures but also intractable status epilepticus. (C) 2001 Published by El
sevier Science B.V.