A malignant neoplasm involving the optic choroid. The disease is choroid cancer (MONDO_0006700, a Monarch Disease Ontology term). Also known as: cancer of optic choroid, malignant choroid neoplasm, malignant choroid tumor, malignant choroid tumour, malignant neoplasm of choroid, malignant neoplasm of optic choroid, malignant neoplasm of the choroid, malignant optic choroid neoplasm.