[Pre and intraoperative volume determination of craniopharyngioma cysts (author's transl)].

Exact cystic volume measurement is a prerequisite to proper 90Y dosage in the therapy of of intracavitary monocystic craniopharyngiomas. The method of intraoperative volume measurement by a radionuclide dilution technique is compared to results obtained by preoperative volumetry using computer tomography. Both methods gave congruous results. It is pointed out that gamma camera scintigrams are essential for the early detection of complications.