Monarch Disease Ontology id MONDO_0002109 (pituitary cancer) is a primary or metastatic malignant neoplasm affecting the pituitary gland. Representative examples include functioning or non-functioning carcinomas arising from the anterior lobe of the pituitary gland, chordomas, chondrosarcomas, and metastatic carcinomas from the breast, lung, and gastrointestinal tract. Also known as: cancer of pituitary gland, malignant neoplasm of pituitary, malignant neoplasm of pituitary gland, malignant neoplasm of the pituitary, malignant neoplasm of the pituitary gland, malignant pituitary gland neoplasm, malignant pituitary gland tumor, malignant pituitary gland tumour.