GJB1 and ACTH-producing pituitary gland adenoma: Cx32 was expressed in 43 of the 60 (72%) pituitary adenoma samples: 22 of the 31 (71%) NF-PitNETs, 16 of the 20 (80%) somatotropinomas, and 5 of the 9 (56%) corticotropinomas.