This paper represents a further investigation into the origninal series, with additional cases from N.I.N.U. This follow-up has been immeasureably enhanced by the availability of the EMI Scanner. It seems clear that there continues to be adequate evidence that the use of shunting procedures, followed by radiotherapy, is a rational approach to tumours of the pineal and posterior third ventricular region. Short of more extensive evidence to the contrary, we feel that it remains the method of choice in the initial treatment of these difficult lesions.

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