title: Brain MRI of hippocampal volumetry in patients with refractory temporal lobe epilepsy.
abstract: OBJECTIVE
  To detect for hippocampal sclerosis presurgically in a group of patients with refractory temporal lobe epilepsy.
  
  
  METHODS
  Eighty-four consecutive patients with refractory temporal lobe epilepsy were subjected to brain MRI of hippocampal volumetry. A ratio of smaller to larger hippocampal volume was determined and unilateral hippocampal atrophy (HA) was diagnosed if the ratio is less than 0.91.
  
  
  RESULTS
  Unilateral HA was diagnosed in 42 patients (50%) and bilateral HA in 1 patient. Other MRI abnormalities were detected in 18 patients with or without coexisting HA.
  
  
  CONCLUSIONS
  Hippocampal sclerosis can be detected presurgically in many patients by brain MRI. Additional abnormalities not detected by brain CT can also be demonstrated.
authors.affiliation: Department of Medicine, Queen Elizabeth Hospital, Kowloon, Hong Kong SAR, China.
authors.forename: K K
authors.initials: KK
authors.lastname: Ng
authors.forename: K W
authors.initials: KW
authors.lastname: Tang
authors.forename: Y L
authors.initials: YL
authors.lastname: Cheung
authors.forename: P C
authors.initials: PC
authors.lastname: Li
mesh_terms: D000328:Adult; D001284:Atrophy; D004833:Epilepsy, Temporal Lobe / Q000473:pathology*; D005260:Female; D006624:Hippocampus / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012598:Sclerosis