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Tinel sign to the median nerve area caused by a proximal tumor as detected by magnetic resonance neurography: Two case reports
Author(s) -
Narita Yugo,
Fukuroku Keiko,
Matsuyama Hirofumi,
Ii Yuichiro,
Maeda Masayuki,
Tomimoto Hidekazu
Publication year - 2019
Publication title -
neurology and clinical neuroscience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.125
0ISSN - 2049-4173
DOI - 10.1111/ncn3.12271
Subject(s) - magnetic resonance neurography , medicine , magnetic resonance imaging , brachial plexus , median nerve , sign (mathematics) , axilla , radiology , anatomy , mathematical analysis , mathematics , cancer , breast cancer
Abstract Tinel sign is a sensitive clinical indicator for the location of nerve lesions, while magnetic resonance imaging is an efficient tool for lesion diagnosis. Several imaging studies of the Tinel sign with a short distance median nerve have been reported. However, few studies have examined the Tinel sign provoked by a distant lesion or its findings in magnetic resonance neurography. Herein, we report our peripheral nerve conduction and magnetic resonance neurography findings for two women with Tinel signs in the median nerve with a long distance caused by a proximal tumor. Case 1 showed a mass at the proximal superior trunk of the brachial plexus, originating from the fifth cervical spinal root. Case 2 showed a mass at the proximal median nerve at the axilla. There were no changes in symptoms or Tinel signs in either case, and no abnormalities in nerve conduction studies including F waves, for >2 years.