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I.はじめに
類上皮腫は,頭蓋内腫瘍のうち約0.5-1.0%の発生頻度でやや稀な良性腫瘍であるが特異なCT所見のため診断は容易である.しかしながら時として悪性変化した類上皮腫があり悪性類上皮腫または類上皮腫癌と呼ばれきわめて稀である.神経放射線学的には術前診断は困難であり,頭蓋内癌性病変のため予後は絶対不良である.われわれは興味ある臨床経過をしめした小脳橋角部の類上皮腫癌の一例を経験したので若干の文献考察をくわえ報告する.
The patient, a 30-year-old man, underwent initial surgery for total removal of a left C-P angle tumor his-tologically diagnosed as epidermoid carcinoma. Postop-erative irradiation therapy was administered over the whole brain and spinal cord, 50 Gy and 20 Gy respec-tively. The patient was then released without symp-toms. 15 months later, he was readmitted for parapare-sis and urinary retention. CT scan revealed no tumorrecurrence in the intracranial area but did show intra-spinal cyst of the lower thoracic level. After cyst-subarachnoid shunt, severe acute hydrocephalus was shown on CT scan.
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