[Partial epilepsies of adolescence with computer tomography abnormalities, localized astrocytic reaction and spontaneously remitting course].

Four teenagers with partial epileptic seizures presented focal cortical enhanced CT scan images. Angiographies were normal. Stereotactic biopsies revealed astrocytic proliferation. CT scan abnormalities diminished or vanished in some months. On long-term follow-up seizures were either less frequent or disappeared. None of the possible aetiologic hypotheses (astrocytoma, encephalitis, sarcoidosis, multiple sclerosis, vascular malformation) was fully satisfying. Nevertheless, a regressive evolution observed in these four patients demonstrates that acquired epileptogenic lesions during adolescence are not always of poor prognosis.