Hypertrophic pachymeningitis

Hypertrophic pachymeningitis is a condition where there is localised inflammatory thickening of the dura. It can result from a number of causes which include:

When no cause is identified it is termed idiopathic hypertrophic pachymeningitis.

Can have a multitude of presentations. Cranial nerve palsies are common.

MRI brain
  • shows localised or less often diffuse dural thickening
  • at times can depict mass like thickening where it is termed tumefactive hypertrophic pachymeningitis 1

Signal characteristics include:

  • T1: thickened areas are hypointense to brain parenchyma on unenhanced T1 images 6
  • T1 C+ (Gd): shows dural enhancement
  • T2: thickened areas are hypointense to brain parenchyma 6

General imaging differential considerations include:

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Article Information

rID: 10824
Section: Pathology
Synonyms or Alternate Spellings:

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