Surgical outcome in hippocampal atrophy (n = 44) and amygdalohippocamp
al atrophy (n = 14) were compared. Hippocampal atrophy had better seiz
ure-free outcome than amygdalohippocampal atrophy (80% versus 50%, p =
0.043). Severity of hippocampal atrophy correlated with duration of e
pilepsy in patients with hippocampal atrophy (r = 0.4, p = 0.007), but
not in those with amygdalohippocampal atrophy, suggesting that these
two groups may have a different pathogenesis.