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Japanese

A Surgical Fenestration of an Arachnoid Cyst in the Cerebellomedullary Cistern Go MATSUOKA 1,2 , Yuichi KUBOTA 1 , Akira ISHII 1 , Akihisa ASAI 1 , Seiji YATO 1 , Yoshikazu OKADA 2 1Department of Neurosurgery, Asakadai Central General Hospital 2Department of Neurosurgery, Tokyo Women's Medical University Hospital Keyword: arachnoid cyst , cerebellomedullary cistern , fenestration pp.221-226
Published Date 2014/3/10
DOI https://doi.org/10.11477/mf.1436102198
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 Arachnoid cysts originating from the cerebellomedullary cistern are very rare, and their indications for surgical treatment remain controversial. A 41-year-old man with a cystic lesion in the left cerebellomedullary cistern presented with sudden perspiration, palpitations, and vertigo. Subsequently, he complained of numbness of the left extremities and a dull headache. Otolaryngological evaluation revealed no abnormality. Physical examination on admission showed no neurological manifestations, except for left sensory disturbance. MRI revealed a cyst in the left cerebellomedullary cistern. Radiological examination did not reveal direct compression of the brain stem by the cyst, but the left cerebellum was compressed by the cyst. The patient underwent surgical fenestration of the arachnoid cyst via the midline suboccipital approach. The symptoms immediately disappeared after surgery. Patients with an arachnoid cyst in the cerebellomedullary cistern usually present lower cranial nerve dysfunction as a symptom. In our case, there was no cranial nerve dysfunction, but anatomically unexplainable symptoms, such as perspiration, palpitations, dizziness, and numbness of the left limbs, were observed. In conclusion, even if a patient with an arachnoid cyst in the posterior cranial fossa presents unexplainable symptoms, surgical intervention, including fenestration, is one of the therapeutic options.


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電子版ISSN 1882-1251 印刷版ISSN 0301-2603 医学書院

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