A malignant neoplasm involving the ethmoid sinus. The disease is Monarch Disease Ontology id MONDO_0001763 (ethmoid sinus cancer). Also known as: cancer of ethmoid sinus, malignant ethmoid sinus neoplasm, malignant ethmoid sinus tumor, malignant ethmoid sinus tumour, malignant ethmoidal sinus neoplasm, malignant ethmoidal sinus tumor, malignant ethmoidal sinus tumour, malignant neoplasm of ethmoid sinus.