I ve been suffering for headaches for several months. A brain scan was performed with the following results. FINDINGS: No acute territorial infarct. No hemorrhage. No hydrocephalus. No midline shift. About the left posterior parietal region is a CSF attenuating ovoid structure, which measures approximately 1.4 cm AP x 2.5 cm transverse. An intra- or extra-axial lesion is possible or potentially a fluid collection. Additional characterization with MRI of the brain with and without contrast is recommended as benign and malignant etiologies are possible. IMPRESSION: 1. Ovoid CSF attenuating collection or lesion about the left posterior parietal region as discussed above. Both benign and malignant etiologies are possible. An additional characterization of the finding with MRI the brain with and without contrast is recommended if not contraindicated. Waiting to speak with a neurologist on this. Is this something serious?