In the 2022 World Health Organization classification of tumors of the pituitary gland, nonfunctioning PitNETs are classified according to their frequency as silent gonadotroph tumors, silent corticotroph tumors, silent immature PIT1-lineage tumors, null cell tumors, and other tumors 1)

1)
Wan XY, Chen J, Wang JW, Liu YC, Shu K, Lei T. Overview of the 2022 WHO Classification of Pituitary Adenomas/Pituitary Neuroendocrine Tumors: Clinical Practices, Controversies, and Perspectives. Curr Med Sci. 2022 Dec;42(6):1111-1118. doi: 10.1007/s11596-022-2673-6. Epub 2022 Dec 22. PMID: 36544040.