This 50y female had been followed in our practice since 2009, when she presented with an incidental finding of a small colloid cyst of the 3rd ventricle. At the time it was not causing any hydrocephalus and a watch and wait policy was adopted. Here is an axial T2 MRI showing the cyst (small dark lesion at foramen of Monro). Over the years she had remained stable but in recent […]