headache, persistent, possibly cluster headache. No evidence of acute ischemic or hemorrhagic lesion on this scan.There is fluid containing thin wall cystic structure (about 16mm) in the right lateral ventricle without evidence of enhancement nor diffusion restriction. This lesion is most likely representing benign intraventricular cyst.The ventricles, sulci and cisterns are symmetric and unremarkable. The gray-white matter differentiation is normal. There is no mass, mass effect, edema, midline shift, intra or extra-axial fluid collection/hemorrhage, restricted diffusion/acute ischemia, or abnormal contrast enhancement. The midline structures and cranial-cervical junction are normal. Normal flow voids are identified in the major intracranial vessels. The mastoid air cells are clear.Retention cyst on the right maxillary sinus.
Intraventricular cyst (16mm) in the right lateral ventricle.No evidence of acute ischemic or hemorrhagic lesion.No abnormal enhancing lesion.