Sequential involvement of the nervous system in subacute combined degeneration

Yang Ki Minn, Seung Min Kim, Se Hoon Kim, Ki Han Kwon, Il Nam Sunwoo

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Purpose: Subacute combined degeneration (SCD) involves progressive degeneration of the spinal cord, optic nerve, and peripheral nerves. Vitamin B12 (VB12) is a co-factor in myelin synthesis. Because each cell that constitutes the myelin component in the central nervous system and peripheral nervous system is different, it is improbable that these cells undergo simultaneous degeneration. However, the sequence of degeneration in SCD has not been established. Materials and Methods: In this study, we analyzed medical records and electrophysiological data of patients who showed neurological symptoms and whose serum VB12 levels were lower than 200 pg/mL. Results: We enrolled 49 patients in this study. Their mean VB12 level was 68.3 pg/mL. Somatosensory evoked potential (SEP) study showed abnormal findings in 38 patients. Of the 40 patients who underwent visual evoked potential (VEP) study, 14 showed abnormal responses. Eighteen patients showed abnormal findings on a nerve conduction study (NCS). In this study, abnormal posterior tibial nerve SEPs only were seen in 16 patients, median nerve SEPs only were seen in 3 patients, abnormal VEPs only in two, and abnormal NCS responses in one patient. No patient complained of cognitive symptoms. Conclusion: In SCD, degeneration appears to progress in the following order: lower spinal cord, cervical spinal cord, peripheral nerve/optic nerve, and finally, the brain.

Original languageEnglish
Pages (from-to)276-278
Number of pages3
JournalYonsei medical journal
Volume53
Issue number2
DOIs
Publication statusPublished - 2012 Mar 1

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Subacute Combined Degeneration
Nervous System
Vitamin B 12
Neural Conduction
Optic Nerve
Myelin Sheath
Peripheral Nerves
Spinal Cord
Tibial Nerve
Neurobehavioral Manifestations
Somatosensory Evoked Potentials
Visual Evoked Potentials
Median Nerve
Peripheral Nervous System
Medical Records
Central Nervous System

All Science Journal Classification (ASJC) codes

  • Medicine(all)

Cite this

Minn, Yang Ki ; Kim, Seung Min ; Kim, Se Hoon ; Kwon, Ki Han ; Sunwoo, Il Nam. / Sequential involvement of the nervous system in subacute combined degeneration. In: Yonsei medical journal. 2012 ; Vol. 53, No. 2. pp. 276-278.
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Sequential involvement of the nervous system in subacute combined degeneration. / Minn, Yang Ki; Kim, Seung Min; Kim, Se Hoon; Kwon, Ki Han; Sunwoo, Il Nam.

In: Yonsei medical journal, Vol. 53, No. 2, 01.03.2012, p. 276-278.

Research output: Contribution to journalArticle

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