Abstract:
:Multiple system atrophy (MSA) manifests as a combination of dysautonomia and motor symptoms/signs. However, rare cases presenting with autonomic failures in absence of motor symptoms/signs until their deaths have been reported and are referred to as non-motor MSA. To clarify pathological findings underlying non-motor MSA patients, we analyzed consecutively autopsied 161 patients with MSA. In results, four patients were identified as having non-motor MSA, who showed isolated autonomic disorders throughout their lives and had minimal pathological changes in the motor systems. We also identified two patients with pathologically minimal MSA, who had minimal pathological involvement in the motor systems and presented with definite parkinsonism and dysautonomia. Survival durations of the non-motor MSA patients were much shorter (1.3-2.0 years) than those of the classical MSA patients (3.0-7.0 years), and the causes of death were all sudden death. The medullary serotonergic neurons were severely involved in the non-motor MSA patients in comparison with the classical MSA patients. Also, one of the pathologically minimal MSA patients had died suddenly and exhibited marked involvement of the medullary serotonergic neurons. The involvement of the medullary catecholaminergic or cholinergic neurons did not differ in severities among the groups. We conclude that non-motor MSA may be a pathological variant of MSA that preferentially involves the medullary serotonergic neurons and autonomic systems in association with poor prognosis.
journal_name
J Neuroljournal_title
Journal of neurologyauthors
Riku Y,Watanabe H,Mimuro M,Iwasaki Y,Ito M,Katsuno M,Sobue G,Yoshida Mdoi
10.1007/s00415-017-8604-ysubject
Has Abstractpub_date
2017-11-01 00:00:00pages
2249-2257issue
11eissn
0340-5354issn
1432-1459pii
10.1007/s00415-017-8604-yjournal_volume
264pub_type
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