Thin-section computed tomography in the evaluation of third ventricular colloid cysts

The computed tomographic (CT) scan findings in 4 cases of third ventricular colloid cyst are presented, and the importance of thin-section CT in the evaluation of this lesion is discussed. Overlapping 8-mm sections are helpful in differentiating normal vasculature adjacent to the foramen of Monro from a third ventricular colloid cyst.