Alternative titles and symbols : Amyotrophy, hereditary neuralgic, with predilection for brachial plexus; Neuritis with brachial predilection; Brachial plexus neuropathy, hereditary; NAPB;
Description : Hereditary neuralgic amyotrophy (HNA) is an autosomal dominant form of recurrent focal
neuropathy characterized clinically by acute, recurrent episodes of brachial plexus
neuropathy with muscle weakness and atrophy preceded by severe pain in the affected
arm.;
Inheritance : Autosomal dominant;
Molecular basis : Caused by mutation in the septin 9 gene (SEPT9, 604061.0001);