Topic of the month...Neuroimaging of pituitary adenomas

The document discusses pituitary adenomas. It describes that pituitary microadenomas are less than 10 mm in size and may cause symptoms of hormonal hypersecretion. Characteristic findings on imaging include an anterior-inferior bulge in the sella floor. Pituitary macroadenomas are 10 mm or larger and cause symptoms of compression. On CT scans, they appear as enhancing masses that can extend superiorly and inferiorly, seen best on coronal views. MRI is more sensitive for detecting microadenomas as rounded hypointensities with delayed enhancement compared to normal pituitary tissue.