Ependymomas have rarely been described to contain pigment other than melanin, neuromelanin, lipofuscin or a combination. In this case report, we present a pigmented ependymoma in the fourth ventricle ...

This is an acute bleed into a tumor, compressing the fourth ventricle, which resulted in acute non-communicating hydrocephalus. Note also the dilated temporal horns. On the higher image (right image), ...

THE area postrema in the cat is a region which protrudes from, the dorsal surface of the medulla into the fourth ventricle. It begins in the midline ventral to the obex and passes rostrally as a ...