There is evidence of prior right sided craniotomy and there is metallic artefact in a right paraclinoid location compatible with prior surgery for aneurysm. Multiple foci of increased T2 signal are seen in the periventricular white matter. The lateral ventricles have an abnormal squared configuration with no septum pellucidum identified, likely developmental in nature.
There is an abnormal ovoid area of hypoenhancement in the central-right pituitary gland measuring 8 x 4 mm in the coronal dimension. There is a small area of T2 hyperintensity in the right side of the pituitary. The infundibulum is minimally deviated toward the left. The cavernous sinuses and optic nerves have a normal appearance.
Impression: The findings suggest a microadenoma in the central right sided pituitary gland. Right cranial surgery, possibly for an aneurysm. Likely developmental abnormality involving the ventricles.