1. Asa SL, Puy LA, Lew AM, Sundmark VC, Elsholtz HP (1993) Cell type-specific expression of the pituitary transcription activator PIT-1 in the human pituitary and pituitary adenomas. J Clin Endocrinol Metab 77:1275–1280
2. Asa SL, Bamberger AM, Cao B, Wong M, Parker KL, Ezzat S (1996) The transcription activator steroidogenic factor-1 is preferentially expressed in the human pituitary gonadotroph. J Clin Endocrinol Metab 81:2165–2170
3. Balogun JA, Monsalves E, Juraschka K, Parvez K, Kucharczyk W, Mete O et al (2015) Null cell adenomas of the pituitary gland: an institutional review of their clinical imaging and behavioral characteristics. Endocr Pathol 26:63–70
4. Brat DJ, Wesseling P, Fuller GN, Roncaroli F (2016) Pituicytoma. In: Louis DN, Ohgaki H, Wiestler OD, Cavenne C (eds) WHO classification of tumours of the central nervous system, revised, 4th edn. IARC Press, Lyon, pp 332–333
5. Coons SW, Estrada SI, Gamez R, White WL (2005) Cytokeratin CK 7 and CK 20 expression in pituitary adenomas. Endocr Pathol 16:201–210