How do we evaluate pituitary masses?

90% of sellar masses are pituitary adenomas and 10 % are rare lesions. Adenomas may arise from differentiated cells (may be secreting or non-secreting) So we see if mass is hormonally functional or not and evaluate local mass effects It is imp to note that incidentalomas occur 20% of the times, and pituitary adenomas take years to be symptomatic