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RISS 인기검색어
- 검색키워드
- 저자 : Ohata Kenji (검색결과 2 건)
- 무료
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- 유료
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Prepontine Chordoma without Bone Involvement : Case Report 증례보고
Bae, Hack Gun,Ohata, Kenji,Katsuyama, Junsuke,Hakuba, Akira 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.1
뇌교에 유착된 매우 드문 경막내 척색종 1례를 보고한다. 5년간의 추적기간 동안 광범위 종양절제에도 불구하고 두차례 재발했으며, 마지막으로 재발된 종양은 gamma knife로 치료되었다. 방사선 치료 1년후 검사한 핵자기공명 촬영상 뇌교부 종양은 감소된 반면, 천막열공 상부로 새로운 경막내 척색종이 보였다. 골밀도 뇌전산화단층 촬영상 두개골침범의 소견은 보이지 않았다. 두개골침범없는 경막내 척색종이 비교적 양성의 성격을띄운다 하더라도, 본증례의 재발양상은 뇌교와의 유착 및 종야의 뇌세포 침윤으로 인해, 두개골을 침범하는 고전적 척색종과 같은 aggressiveness를 보였다. 종양의 장기간 재발방지를 위한 보조적치료로 방사선치료가 요망된다. Presented here is an extremely rare case of intradural extraosseous chordoma with tenacious adhesion to the pons. During the 5 years' follow-up period, the tumor has recurred locally twice in the prepontine region despite radical excisions and final irradiation with gamma knife. Magnetic resonance image obtained 1 year after radiosurgery demonstrated a new intradural mass growing above the tentorial hiatus, whereas the mass within the pons was markedly reduced. High resolution computed tomographic scan showed no evidence of bone involvement. Even though intradural location without bone involvement is a relatively benign occurrence, the recurrent pattern suggests and aggressiveness that correlates classic chordoma because of its invasion to the pons. Adjuvant radiotherapy will be required in this case for a long-term control.
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Medulloblastoma Manifesting as Sudden Sensorineural Hearing Loss
Terakawa, Yuzo,Tsuyuguchi, Naohiro,Takami, Toshihiro,Ohata, Kenji The Korean Neurosurgical Society 2011 Journal of Korean neurosurgical society Vol.50 No.1
We present a rare case of medulloblastoma which presented with unilateral sudden sensorineural hearing loss as an initial symptom. A 19-year-old man was admitted to our hospital with a chief complaint of dizziness and facial numbness on the right side. His illness had begun two years previously with sudden hearing loss on the right side, for which he had been treated as an idiopathic sudden hearing loss. Magnetic resonance imaging demonstrated abnormal signals located mainly in the right middle cerebellar peduncle. We performed partial resection of the tumor by suboccipital craniotomy. The histopathological diagnosis was medulloblastoma. Intrinsic brain tumor is an extremely rare cause of sudden sensorineural hearing loss and is therefore easily overlooked as was in the present case. The present case highlights not only the need to evaluate patients with sudden sensorineural hearing loss by magnetic resonance imaging but also the importance of paying attention to intrinsic lesions involving the brainstem. Although this condition like the presented case might be rare, intrinsic brain tumor should be considered as a potential cause of sudden sensorineural hearing loss, as it may be easily missed leading to a delay in appropriate treatment.
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