Neck and other muscle pains in autonomic failure: their association with orthostatic hypotension.

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Abstract
Neck pain in the suboccipital and paracervical region (‘coathanger' configuration) is often reported by patients with autonomic failure and orthostatic hypotension. The frequency of this pain, along with pains in the buttock and calf regions, was determined by questionnaire in two major groups with primary chronic autonomic failure—pure autonomic failure (PAF) and multiple system atrophy (MSA). Comparisons were made with Parkinson's disease, cerebellar degeneration and other disorders in which neurological symptoms overlap but in which there was neither autonomic failure nor orthostatic hypotension. Neck pain was present in 93% of patients with PAF, 51% of patients with MSA and 38–47% of the non-autonomic groups. Buttock pain was present in smaller but similar proportions (8–19%) of each group, like calf pain (23–37%). Neck pain in PAF and MSA differed from that in the other groups in being relieved by sitting or lying flat and in being associated with factors that lower blood pressure in these patients. Buttock pain was posturally related in PAF and MSA; for calf pain there was no difference between groups. Neck pain was related to the degree of orthostatic hypotension; in PAF patients, whose postural blood-pressure fall was greater than that in MSA, there was a greater frequency of neck pain.