A primary or metastatic neoplasm that affects the hypothalamus. The disease is Monarch Disease Ontology entry MONDO_0006799 (hypothalamic neoplasm). Also known as: hypothalamic neoplasms, hypothalamic tumor, hypothalamic tumour, hypothalamus neoplasm, hypothalamus tumor, hypothalamus tumour, neoplasm of hypothalamus, neoplasm of the hypothalamus.