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The aim of this study is to investigate the normal three dimensional (3D) shape of the ventricular system of rat brain. The shape and volume of ventricles can be correlated with clinical or other characteristics of illness. Recently, many diagnostic imaging techniques allow to get the 3D images of anatomical structures easily. So it is possible to determine the correlation between subjects and pattern of the structures. In this study, we constructed a 3D model of the rat ventricles and their related structures. It is possible to say that, ventricular system of rat brain was similar to the human's completely. Understanding such patterns may eventually help to improve rat experiments' vision. Furthermore, these 3D models can be used for virtual animations and stereotaxic trials in further studies.

A very rare case of a pontine hydatid cyst is reported. It was diagnosed preoperatively on the basis of magnetic resonance imaging findings. The patient was operated on in the sitting position. Total excision of the cyst using the Dowling technique and gravity effect was performed through the floor of the fourth ventricle. The patient was discharged without extra neurological sequel. The significance of an accurate preoperative diagnosis, surgical approaches and technique in the management of this pathology is discussed.