A rare, hormonally functioning or non-functioning pituitary gland adenocarcinoma that produces corticotropin. It may be associated with Cushing disease. The disease is Monarch Disease Ontology identifier MONDO_0006069 (ACTH-producing pituitary gland carcinoma). Also known as: ACTH producing pituitary gland carcinoma, malignant ACTH producing neoplasm of pituitary, malignant ACTH producing neoplasm of pituitary gland, malignant ACTH producing neoplasm of the pituitary, malignant ACTH producing neoplasm of the pituitary gland, malignant ACTH producing pituitary gland neoplasm, malignant ACTH producing pituitary gland tumor, malignant ACTH producing pituitary gland tumour.