Relative merits of different modalities for diagnosis of sellar and suprasellar tumours

Even after the availability of CT, numertous authers indicated the need for poisitive contrast CT studies or pneumoencephalography to define the presence and locations of the lesion within the suprasellar cistern. In most cases, CT not only is diagnostic but shows the extent of the lesion. In occasional cases, CT following intrathecel metrizamide with axial and coronal sections obviates the need for other invasive studies