“…In case of microadenomas, the main differential diagnoses are clinically non-functioning microadenoma, Rathke’s cleft cyst, or pars intermedia cyst. Main differential diagnoses of macroadenomas are pituitary hyperplasia, meningiomas, metastasis, craniopharyngioma, carcinoma, aneurysm, hypophysitis, and chordomas ( 90 ). Most of these pathologies can be easily differentiated from prolactinomas based on clinical symptoms, imaging features, and above all determination of PRL.…”