64-year-old male with respiratory failure pre-lumbar puncture evaluation. Provided further history of vascular malformation. There is no evidence of intracranial hemorrhage or edema. Right frontal mass-like lesion overlying right frontal cortex with internal coarse popcorn calcifications measuring approximately 3.4 x 2 .4 cm (series 3 image 21). This lesion exerts a mass effect on underlying right precentral and postcentral gyri with minimal sulcal effacement and an about one to 2 mm of midline shift to the left. This is unchanged compared to prior MRI. The right ventricle appear slightly asymmetrically thinner than the left likely from minimal mass effect of the extra-axial mass.The basal cisterns, third and fourth ventricles are normal in size and configuration. The calvaria and skull base unremarkable. The orbits are unremarkable. The visualized paranasal sinuses are well pneumatized. There is partial opacification of bilateral mastoid air cells.
1. No acute intracranial hemorrhage. 2. Right frontal mass like lesion is compatible with vascular malformation seen on an outside MRI. The associated minimal mass-effect and midline shift have been stable. Further evaluation with brain MRA and MRI is recommended. 