A 10-year-old boy with the history of headache, anorexia, and vomiting was referred to Radiology Department of French Medical Institute for Children to undergo a brain CT scan. The CT scan was performed with 128 slices' Siemens scanner. Precontrast images demonstrated a well-defined, rounded, hyperdense lesion at the level of the foramen of Monro causing moderate dilatation of the lateral ventricles. No specks of calcification were appreciated in the cyst. No significant enhancement appeared after intravenous contrast injection (Figures and ).
A 55-year-old male presented with progressive memory disturbance and unsteady gait for 8 months, which became more profound at the time of presentation.