ReviewZhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences2023
Clinical and molecular genetic characteristics of 24 families of hereditary neuropathy with liability to pressure palsy and literature review.
Review in Zhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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7 authors at 1 institution in 1 country.
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Abstract
objectivesHereditary neuropathy with liability to pressure palsy (HNPP) is a rare autosomal dominant peripheral neuropathy, usually caused by heterozygous deletion mutations in the peripheral myelin protein 22 (
methodsHNPP patients in the Department of Neurology at Third Xiangya Hospital of Central South University from 2009 to 2023 were included in this study. The general clinical data, nervous electrophysiological and molecular genetic examination results were collected and analyzed. Molecular genetic examination was to screen for deletion of
resultsA total of 34 HNPP patients from 24 unrelated Chinese Han families were included in this study, including 25 males and 9 females. The average age at illness onset was 22.0 years. Sixty-two point five percent of the families had a positive family history. Among them, 30 patients had symptoms of peripheral nerve paralysis. Patients often presented with paroxysmal single limb weakness with (or) numbness (25/30), and some patients had paroxysmal unilateral recurrent laryngeal nerve (vagus nerve) paralysis (2/30). Physical examination revealed muscle weakness (23/29), hypoesthesia (9/29), weakened or absent ankle reflexes (20/29), distal limb muscle atrophy (8/29) and high arched feet (5/29). Most patients (26/30) could fully recover to normal after an acute attack. Thirty-one patients in our group underwent nervous electrophysiological examination, and showed multiple demyelinating peripheral neuropathies with both motor and sensory nerves involved. Most patients showed significantly prolonged distal motor latency (DML), mild to moderate nerve conduction velocity slowing, decreased amplitude of compound muscle action potential (CMAP) and sensory nerve action potential (SNAP), and sometimes with conduction block. Nerve motor conduction velocity was (48.5±5.5) m/s, and the CMAP amplitude was (8.4±5.1) mV. Nerve sensory conduction velocity was (37.4±10.5) m/s, and the SNAP amplitude was (14.4±15.2) μV. There were 24 families, 23 of whom had the classical
conclusionsHeterozygous deletion mutation of
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