We report 2 children with partial epilepsy who manifested social and l
anguage regression and partial recovery after surgical treatment. One
child had seizures since the first 2 weeks of life, caused by a right
temporal dysembryoplastic neuroepithelial tumor and regression in the
latter part of the first year; seizures were relieved and some functio
ns were recovered after temporal lobe resection at 12 months of age. T
he second child developed epilepsy at 3 years 3 months, and between 5
years 9 months and 6 years 1 month he became aphasic (Landau-Kleffner
syndrome) and lost social functioning, manifesting a very severe behav
ior disorder. He exhibited a significant improvement in communication,
social functioning, and behavior after left multiple subpial transect
ions. Both children manifested evidence of subclinical seizure activit
y in both temporal lobes. Their clinical picture was one of combined l
anguage and autistic regression, and the autistic features demonstrate
d a clear response to surgical treatment. We suggest that in pediatric
epilepsy surgical programs, autistic regression should prompt urgent
investigation if drug treatment is not effective. (C) 1997 by Elsevier
Science Inc.