Jankowska et al found six-fold higher expression level of survivin expression in different pituitary tumors (acromegaly (n = 14), non-functioning pituitary tumor (n = 6), prolactinoma (n = 2) and corticotropinoma (n = 1)) than in normal pituitary tissue. The gene discussed is BIRC5; the disease is ACTH-producing pituitary gland adenoma.