A hormone producing or non-producing pituitary gland adenoma or carcinoma, not associated with a hormonal syndrome. The disease is non-functioning pituitary gland neoplasm (Monarch Disease Ontology id MONDO_0003603). Also known as: Nonfunctioning pituitary tumor, Nonfunctioning pituitary tumour, non-functioning endocrine neoplasm of pituitary gland, non-functioning neoplasm of pituitary, non-functioning neoplasm of pituitary gland, non-functioning neoplasm of the pituitary, non-functioning neoplasm of the pituitary gland, non-functioning pituitary gland tumor.