Clinical question: Rule out intracranial mass. Signs and symptoms: New onset of focal headaches. Nonenhanced brain MRI:No evidence of acute intracranial process and negative diffusion weighted images.Examination demonstrates normal anatomical morphology and signal intensity of brain parenchyma on all MRI sequences.Unremarkable surgical cortex, cortical sulci, ventricular system, CSF spaces and myelination of brain.A signal void of major intracranial arterial branches are identified.The signal intensity of intracranial venous sinuses remains within normal.Unremarkable calvarium, soft tissues of the scalp, orbits, paranasal sinuses and mastoid air cells. A small right maxillary sinus retention cyst however is detected.
Negative nonenhanced brain MRI.