2019 Volume 28 Issue 10 Pages 640-645
Hypertrophic pachymeningitis (HP) is a rare inflammatory disorder presenting with thickening of the dura mater. In patients with idiopathic hypertrophic pachymeningitis (IHP) presenting with tumor-like lesions, discrimination between HP and en-plaque meningioma using magnetic resonance imaging (MRI) is difficult. Here we report an extremely rare case of IHP in the clival region in a patient presenting with hypoglossal nerve palsy who was diagnosed by surgical biopsy.
In the current case, biopsy was necessary for the definitive diagnosis because MRI revealed an extra-axial mass lesion mimicking meningioma. The treatment for IHP is different from that for meningioma ; therefore, it is critical to confirm a definitive diagnosis with biopsy.
