Dorsal root ganglia volume differentiate schwannomatosis and neurofibromatosis 2

Abstract

Schwannomatosis and neurofibromatosis type 2 are hereditary tumor syndromes and peripheral neuropathy has been reported in both. We prospectively applied in-vivo morphometric measurement of dorsal root ganglia volume in 16 schwannomatosis, 14 neurofibromatosis type 2 patients, and 26 healthy controls by MR-Neurography. Compared to healthy controls, dorsal root ganglia hypertrophy was a consistent finding in neurofibromatosis type 2 (L3: +267%, L4: +235%, L5: +241%, S1: +300% and S2: +242%, Bonferroni-adjusted p<0.001) but not in schwannomatosis. Dorsal root ganglia may be a vulnerable site in origination of areflexia and sensory loss and a useful diagnostic marker in neurofibromatosis type 2. This article is protected by copyright. All rights reserved.

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