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A muli-lobulated enhancing sellar/suprasellar mass involving the pituitary gland and infundibulum is present. The posterior aspect of the optic chiasm is contacted by the superior component of the mass without compression. No evidence of cavernous sinus invasion. The flow voids of both cavernous internal carotid arteries are preserved.
The remainder of the imaged brain appears unremarkable.
The sellar mass extending along infundibulum to hypothalamus is an unusual configuration for a macroadenoma. Given the history of breast carcinoma, pituitary metastasis is favoured.
Lymphocytic hypophysitis, histiocytosis and granulomatous hypophysitis are less likely possibilities given the clinical context.