Metastatic breast adenocarcinoma. There is an unchanged T1 hyperintense cyst lesion in the pituitary that measures up to 10 mm in width and 6 mm in height. There is no evidence of intracranial hemorrhage or acute infarct. The brain parenchyma appears unremarkable. There is no abnormal intracranial enhancement. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits, skull, and paranasal sinuses are grossly unremarkable. There is a nonspecific subcentimeter right apical scalp nodule.
An unchanged lesion in the pituitary gland likely represents a pars intermedia cyst. Otherwise, no evidence of intracranial metastases.