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Partial Conduction Block as an Early Nerve Conduction Finding in Neurolymphomatosis

Authors
 Hyung Jun Park  ;  Ha Young Shin  ;  Se Hoon Kim  ;  Ha Neul Jeong  ;  Young Chul Choi  ;  Bum Chun Suh  ;  Kee Duk Park  ;  Seung Min Kim 
Citation
 Journal of Clinical Neurology, Vol.14(1) : 73-80, 2018 
Journal Title
 Journal of Clinical Neurology 
ISSN
 1738-6586 
Issue Date
2018
Keywords
conduction block ; leukemia ; lymphoma ; nerve conduction study ; neurolymphomatosis
Abstract
BACKGROUND AND PURPOSE: Neurolymphomatosis is a rare manifestation of hematological malignancy and is characterized by direct infiltration of the peripheral nervous system. The objective of this study was to identify the clinical and electrophysiological features of neurolymphomatosis. METHODS: We retrospectively analyzed the medical records of 13 patients with neurolymphomatosis. Seven (54%) of the patients were men, and the median age at symptom onset was 60.0 years. RESULTS: The most common type of underlying malignancy was diffuse large B-cell lymphoma (69%). Twelve patients had painful asymmetric neuropathies. The median survival time after diagnosis was 7 months, and 12 patients died during the study period. Thirty-eight motor nerve conduction studies (NCSs) were performed in the affected nerves. Ten and 28 motor nerves were classified into the conduction-block and simple-axon-degeneration groups, respectively. The median time interval between symptom onset and the NCS was significantly shorter in the conduction-block group than in the simple-axon-degeneration group (p=0.032). However, no significant differences in the motor nerve conduction velocities, terminal latencies, and distal compound muscle action potential amplitudes were identified between the conduction-block and simple-axon-degeneration groups. The conduction-block group showed excessive temporal dispersion in only five of the ten NCSs (50%). Follow-up NCSs revealed that partial conduction blocks had changed into axonal degeneration patterns. CONCLUSIONS: This is the first study to analyze the electrophysiological features of patients with neurolymphomatosis. Our findings showed that a partial conduction block is not rare and is an early nerve conduction abnormality in neurolymphomatosis.
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DOI
10.3988/jcn.2018.14.1.73
Appears in Collections:
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Pathology (병리학교실)
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Neurology (신경과학교실)
Yonsei Authors
김세훈(Kim, Se Hoon) ORCID logo https://orcid.org/0000-0001-7516-7372
김승민(Kim, Seung Min) ORCID logo https://orcid.org/0000-0002-4384-9640
신하영(Shin, Ha Young) ORCID logo https://orcid.org/0000-0002-4408-8265
정하늘(Jeong, Ha Neul)
최영철(Choi, Young Chul)
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URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/162319
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