喉頭癌放射線化学療法後に発症したＷｅｒｎｉｃｋｅ脳症例

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  • A Case of Wernicke's Encephalopathy that Developed after Treatment of Laryngeal Cancer
  • リンショウ コウトウ ガン ホウシャセン カガク リョウホウゴ ニ ハッショウシタ Wernicke ノウショウレイ

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A patient with laryngeal cancer had difficulty in eating during radio-chemotherapeutic treatment. Transfusion without vitamins had been given for 40 days, then dizziness on walking and nystagmus developed.<br>Equilibrium function tests showed a saccadic pattern of the ETT, inhibition of the OKP and the reduced caloric responce, but the normal VEMP. Symmetrical high-intensity lesions from the thalamus to the brain stem was observed on MRI-FLAIR.<br>Since Wernicke encephalopathy was suspected, administration of vitamin B1 was started. Four days later, dizziness improved and appetite was increased. ETT, OKP and MRI findings improved.<br>Although thiamine deficiency in the blood was not proved, Wernicke encephalopathy was highly suspected. The equilibrium function tests and MRI findings suggested a lesion from the thalamus to the abducens nucleus. Thiamine administration improved the symptoms rapidly. It is necessary for undernourished patients to take a vitamin supplements to prevent Wernicke encephalopathy.

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