The patient went on to have a debulking incomplete resection. 

Histology

Microscopic Description:

Sections show fragments of pituitary adenoma: tumor cells are arranged in trabeculae, acinar structures and diffuse sheets. Immunohistochemical studies show negative immunoreactivity for ACTH, GH, LH, FSH, TSH and prolactin.

Final diagnosis: ​Pituitary adenoma, null cell type.