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Case report
In April 2009, a 59-year-old Afro-Caribbean man gave a 6-month history of progressive unsteadiness and falls. He reported heavy legs, tiredness on walking and painless paraesthesia below the knees. There were cramps in his hands, with weakness when attempting to open jars.
He had a previous diagnosis of achalasia, for which he had sought medical attention 1 year before developing neurological symptoms. He had reported dysphagia to solids and liquids, with 10 kg weight loss. Barium swallow showed barium hold up in the distal oesophagus, tapering to a beak-like appearance. Oesophageal manometry showed elevated lower oesophageal sphincter pressure, with failure to relax on swallowing, consistent with achalasia. This was managed with two cycles of botulinum toxin injections to the lower oesophageal sphincter and oesophageal dilatation, initially with good results. He took ferrous sulfate for an unspecified anaemia. There was no toxin exposure or alcohol overuse, but he smoked marijuana occasionally. There was no relevant family history.
On examination, there was wasting below the knees and in the small hand muscles, with distal symmetrical weakness. He had only a flicker of movement in the hallux and small muscles of the hands and mild weakness of movements around the ankle and finger extensors. He was areflexic. Sensory examination showed ‘stocking-and-glove’ sensory loss to light touch; vibration sense was present at the ankles, but proprioception present only for large movements of the hallux. Pinprick sensation was normal. General examination was normal.
Nerve conduction studies showed a severe sensorimotor polyneuropathy, which …
Footnotes
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Contributors All authors had access to the data and a role in writing the manuscript. MG and CMG wrote the draft manuscript. JAG provided the histology slides and wrote the legend for Figure 1. JH, JND and CJW contributed to drafting of the manuscript.
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Competing interests None.
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Provenance and peer review Not commissioned; externally peer reviewed. This paper was reviewed by John Winer from Birmingham, UK.
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