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a Tumor in the quadrigeminal plate growing towards the fourth ventricle. b Transtentorial occipital approach. c Right occipital transtentorial view. The pineal gland and splenium are exposed. d. Quadrigeminal plate tumor growing towards the fourth ventricle, operated via transtentorial-occipital approach. e. Postoperative imaging 9 years after gross total resection of the lesion, showing no evidence of tumor, which was a pilocytic astrocytoma
