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Publications (6)11.97 Total impact

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    ABSTRACT: Deep brain stimulation (DBS) of the ventral intermediate nucleus of the thalamus (VIM) is a powerful surgical option in the treatment of tremor-predominant Parkinson's disease. However, its therapeutic efficacy depends on the tremor distribution. DBS is highly efficient in relief of distal appendicular tremor but not other types of tremor. Also, it is generally thought that DBS of the VIM has no significant beneficial effects on other motor symptoms of Parkinson's disease. We report two hemiparkinsonian patients, in whom unilateral VIM DBS combined with posteroventral pallidotomy produced long-lasting suppression of not only hand tremor, but also leg or jaw tremor and other motor symptoms.
    Journal of Clinical Neuroscience 08/2009; 16(11):1489-91. DOI:10.1016/j.jocn.2009.02.006 · 1.38 Impact Factor
  • K Korematsu · S Yoshioka · E Abe · Y Nagai · Y Kai · M Morioka · J Kuratsu
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    ABSTRACT: The authors report a rare example of an isolated dissecting posterior inferior cerebellar artery (PICA) aneurysm with spontaneous resolution. A 41 year-old male suffered sudden dizziness, nausea and vomiting. An angiogram and magnetic resonance imaging (MRI) detected an isolated PICA dissection. The patient was treated conservatively and recovered without any apparent neurological deficit. MRI detected the self-resolution of the dissecting aneurysm. Dissecting PICA aneurysms, especially non-haemorrhagic lesions, have the possibility of spontaneous resolution resulting in a favorable outcome. The treatment strategy for this vascular lesion may be decided based upon neuroradiological changes on careful follow-up.
    Acta Neurochirurgica 02/2008; 150(1):77-81; discussion 81. DOI:10.1007/s00701-007-1422-8 · 1.77 Impact Factor
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    ABSTRACT: The authors report a case of cerebellar cavernous malformation associated with moyamoya disease. An adolescent male with moyamoya disease had undergone bilateral direct and indirect extracranial-intracranial anastomosis at 11 years of age, and the course had been uneventful until MRI detected the appearance of a cavernous malformation in the cerebellum 3 years later. The lesion had grown, bled, and caused headache and disturbance of consciousness 2 years after the initial detection. The cavernous malformation was removed surgically and pathologically verified. The patient has recovered without any neurological deficits. This is a quite rare case with cavernous malformation which appeared in a moyamoya disease patient. The association of the two different vascular disorders in a young patient may suggest the existence of some interaction in the pathogenesis of these diseases. Since cavernous malformations with a de novo appearance may grow and become clinically significant, careful observation is necessary.
    Clinical Neurology and Neurosurgery 11/2007; 109(8):708-12. DOI:10.1016/j.clineuro.2007.04.016 · 1.13 Impact Factor
  • Stroke 06/2007; 38(5):e10; author reply e11. DOI:10.1161/STROKEAHA.106.474635 · 5.72 Impact Factor
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    ABSTRACT: We report a 1-year-old girl who presented moyamoya disease associated with midaortic syndrome. She had been treated for cardiac failure and severe hypertension due to midaortic syndrome until she suffered seizure and repeated cerebral ischemic attack. Cerebral angiography revealed stenosis of the bilateral internal carotid artery at its terminal portion. She was successfully treated with encephaloduroarteriosynangiosis, and ischemic attack ceased postoperatively. This is the first report of moyamoya disease with midaortic syndrome. Although cerebral ischemic attack has been effectively managed by encephaloduroarteriosynangiosis, renovascular hypertension is still difficult to control.
    Pediatric Neurosurgery 02/2007; 43(1):54-9. DOI:10.1159/000097528 · 0.33 Impact Factor
  • Shu Hasegawa · Susumu Yoshioka · Shougo Urabe · Jun-ichi Kuratsu
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    ABSTRACT: This 77-year-old woman with a rapidly enlarging chordoid meningioma first noticed a growing, non-pulsatile, nonpainful soft mass in the left temporal region after a head trauma 2 years earlier. Neuroimaging showed a homogeneously enhanced osteolytic mass lesion in the left temporal bone. Surgery revealed an extradural tumor without significant adhesions. Histopathologically it was a meningioma with features reminiscent of chordoma. Most of the tumor cells contained mucin-rich chordoid elements. Immunohistochemically, the lesion was positive for vimentin and epithelial membranous antigen; it was negative for cytokeratin and S-100 protein. Based on these findings a diagnosis of chordoid meningioma was made. We posit that the rapid enlargement of the tumor over a relatively short period was attributable to its high mucin-producing activity.
    Neuropathology 11/2006; 26(5):438-41. DOI:10.1111/j.1440-1789.2006.00708.x · 1.65 Impact Factor