An adenoma or carcinoma of the pituitary gland that produces corticotropin. The disease is ACTH-producing pituitary gland neoplasm (MONDO_0045058, a Monarch Disease Ontology entry). Also known as: ACTH producing pituitary gland neoplasm, ACTH-producing pituitary neoplasm, ACTH-producing pituitary tumor, ACTH-producing pituitary tumour, ACTH-secreting tumor of pituitary, ACTH-secreting tumor of the pituitary, ACTH-secreting tumour of pituitary, ACTH-secreting tumour of the pituitary.