Symmetric sensorineural progressive hearing loss from chronic idiopathic pachymeningitis.

We present the case of a 68 year-old man with a diffused hypertrophic pachymeningitis (HP) involving both internal auditory canals. The clinical symptoms were headache, decreased vision in one eye, progressive bilateral and symmetrical sensory-neural hearing loss (PSNHL) responsive to steroid treatment. Although hearing loss is a frequent manifestation of HP, only few studies reported an adequate audiological assessment and follow-up. Mechanisms related to the auditory involvement are discussed on the basis of audiological data. Gadolinium enhanced MRI is the most adequate technique for HP detection and for the differential diagnosis. A delay in the diagnosis of HP seems to be quite common and the consequences may be severe, especially in cases of optic nerve involvement. For these reasons, a cerebral MRI should probably be included in the assessment of PSNHL, especially when neurological signs coexist or are reported in the medical history.