Histology of hereditary neuralgic amyotrophy.

[neuralgic amyotrophy]

We report the findings in five muscle and three sural nerve biopsies , and in one postmortem plexus specimen , from six patients with hereditary neuralgic amyotrophy (HNA ). We found that the sensory nerves are definitely involved in HNA despite the mainly motor symptoms , and that lesions in nerves and muscles are more widespread throughout the peripheral nervous system than clinically presumed , but , simultaneously , very focally affect isolated fascicles within individual nerves .