Transient subacute cerebellar ataxia in a patient with Lambert-Eaton myasthenic syndrome after intracranial aneurysm surgery

Nakamura Masakazu; Yabe Ichiro; Sato Kazunori; Nakano Fumihito; Yaguchi Hiroaki; Tsuji Sachiko; Shiraishi Hirokazu; Yoneda Makoto; Tanaka Keiko; Motomura Masakatsu; Sasaki Hidenao

Title	en Transient subacute cerebellar ataxia in a patient with Lambert-Eaton myasthenic syndrome after intracranial aneurysm surgery
Creator	en Nakamura, Masakazu en Yabe, Ichiro NRID 1000060372273 en Sato, Kazunori en Nakano, Fumihito en Yaguchi, Hiroaki en Tsuji, Sachiko en Shiraishi, Hirokazu en Yoneda, Makoto en Tanaka, Keiko en Motomura, Masakatsu en Sasaki, Hidenao NRID 1000080281806
Accessrights	open access
Subject	NDC 493
Description	Abstract en Several reports have presented patients with subacute cerebellar ataxia (subacute CA) and Lambert-Eaton myasthenic syndrome (LEMS). Some clinical features of those patients have been described in the previous reports, such as priority of subacute CA to LEMS or a concurrent occurrence of both diseases, a high incidence of malignancy, less efficacy of the treatment for subacute CA compared with that for LEMS. Cerebellar ataxia in some patients with LEMS has been demonstrated to be caused by serum antibodies to P/Q-type voltage-gated calcium channels (VGCCs). Here, we report a 63-year-old woman with subacute CA and LEMS. Cerebellar ataxia appeared 15 months after the incidence of LEMS, and the onset of cerebellar ataxia was thought to be due to serum anti-P/Q-type VGCCs antibodies. The clinical course of this patient was atypical in that 1) LEMS preceded subacute CA which developed after intracranial aneurysm surgery, 2) no malignancy was detected when both diseases coexisted, 3) symptoms of LEMS did not progress with the onset of cerebellar ataxia, and 4) cerebellar ataxia showed a definite improvement in symptoms and by 123I-IMP SPECT imaging after steroid administration. In addition, it is remarkable that LEMS became aggravated in electrophysiological examinations in contrast to subacute CA. We suggest that these atypical features of subacute CA and the changes in LEMS may be associated with a balance between the amount of serum anti-P/Q-type VGCCs antibodies and the susceptibility of the cerebellum and presynaptic nerve terminals to the antibodies. More cases are needed to investigate the mechanisms involved. The subacute CA and LEMS in this patient have remained comparatively silent after the withdrawal of steroid, and we are continuing to observe her condition.
Publisher	en Elsevier
Date	Issued2008-05
Language	eng
Resource Type	journal article
Version Type	AM
Identifier	HDL http://hdl.handle.net/2115/33929
Relation	URI http://www.sciencedirect.com/science/journal/03038467 isVersionOf DOI https://doi.org/10.1016/j.clineuro.2008.01.002 PMID 18295972
Journal	PISSN 0303-8467 en Clinical Neurology and Neurosurgery Volume Number110 Issue Number5 Page Start480 Page End483
File	fulltext yabe.pdf 341.34 KB (application/pdf) Issued2008-05
Oaidate	2023-07-26