Clinical question: Hemorrhage? Infection? Signs and symptoms: Altered mental status. Nonenhanced head CT:Examination demonstrates a well demarcated high density lesion projecting into the left frontal horn and partial involvement of the septum pellucidum. This lesion measures 10.7 x 8.8-mm in size on axial image 12. Differentials for this lesion includes a cavernoma and less likely possibility of a colloid cyst cannot be entirely ruled out. There is no associated edema or any mass effect with this finding and no hydrocephalus is detected. Recommend unenhanced MRI examination for further evaluation.There is no evidence of hemorrhage, edema, mass-effect, midline shift or hydrocephalus.Cortical sulci, ventricular system and CSF cisterns as well as gray -- white matter differentiation all remain within normal.Calvarium, visualized paranasal sinuses, mastoid air cells, middle ear cavities and orbits are unremarkable.
1.Well demarcated high density mass measuring 10.7 x 8.8-mm in the left frontal horn with involvement of septum pellucidum as described. Recommend further follow-up with a pre-and post enhanced MRI of brain.2.The non-infused head CT is otherwise unremarkable.