====== Adenohypophyseal tumor ======

[[The 2022 World Health Organization classification of tumors of the pituitary gland]] distinguishes the anterior lobe of the [[pituitary gland]] ([[Adenohypophysis]]) from the posterior lobe ([[neurohypophysis]]) and [[hypothalamic tumor]]s. 

Anterior lobe tumors include (i) well-differentiated [[adenohypophyseal tumor]]s that are now classified as [[pituitary neuroendocrine tumor]]s ([[PitNET]]s; formerly known as [[pituitary neuroendocrine tumor]]s), (ii) [[pituitary blastoma]], and (iii) the two types of [[craniopharyngioma]].

===== Old term =====

a) [[adenoma]]

● [[microadenoma]]: < 1cm diameter 

● [[macroadenoma]]: ≥ 1cm diameter

● [[invasive pituitary neuroendocrine tumor]]: Includes aggressive tumors of Nelson’s syndrome