 The ventricles and sulci are normal in size. The cerebellar tonsils are in normal position. There are no masses, mass effect or midline shift. There is no evidence for intracranial hemorrhage or acute cerebral, brainstem or cerebellar infarction. No diffusion-weighted abnormalities are identified. There are no extraaxial fluid collections or subdural hematomas. Flow voids are present within the major vessels indicating patency. The paranasal sinuses and mastoid air cells are clear. There is no abnormal enhancement within the brain. There is a 6 mm maximal dimension focus of relative hypoenhancement within the superior border of the left paramedian anterior pituitary gland, which is heterogeneous on both T1 and T2 noncontrast sequences. The pituitary stalk is slightly deviated leftward to this region. There is no involvement of the optic apparatus or the cavernous sinuses.
There is a 6 mm maximal dimension focus of relative hypoenhancement within the superior border of the left paramedian anterior pituitary gland, which is heterogeneous on both T1 and T2 noncontrast sequences suggestive of pituitary adenoma.