Taylor dysplasia

Taylor dysplasia is a type of focal cortical dysplasia and a common cause of refractory epilepsy. Under both the Palmini classification and the more recent Blumcke classification of focal cortical dysplasia, Taylor dysplasia is classified as type II. 

For further discussion of the radiographic features please refer to the parent article: focal cortical dysplasia.


Taylor dysplasia is determined histologically due to the presence of certain features such as  giant neurons, dysmorphic neurons with or without balloon cells 4,7. The latter further divides FCDT into two main subtypes 2,7.

  • type IIa: no balloon cells
  • type IIb: balloon cells present

See: Palmini classification and Blumcke classification.

History and etymology

Taylor dysplasia is named after David C. Taylor, a British psychiatrist who first described it in 1971 5.

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Article information

rID: 9579
Tag: cases
Synonyms or Alternate Spellings:
  • Focal cortical dysplasia of Taylor
  • Taylor type focal cortical dysplasia
  • Type II focal cortical dysplasia
  • Focal transmantle dysplasia
  • Taylor dysplasias
  • Taylor type dysplasia
  • Focal cortical dysplasia of Taylor (FCDT)
  • FCDT
  • Transmantle cortical dysplasia

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Cases and figures

  • Case 1: type IIB
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  • Case 2: right frontal and insular
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  • Case 3
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  • Case 4: on right side - subtle
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