A malignant neoplasm that affects the sweat glands. The disease is sweat gland cancer (MONDO_0002206, a Monarch Disease Ontology entry). Also known as: cancer of sweat gland, malignant neoplasm of sweat gland, malignant neoplasm of the sweat gland, malignant sweat gland neoplasm, malignant tumor of sweat gland, malignant tumor of the sweat gland, malignant tumour of sweat gland, malignant tumour of the sweat gland.