Neoplasms composed of connective tissue, including elastic, mucous, reticular, osseous, and cartilaginous tissue. The concept does not refer to neoplasms located in connective tissue. The disease is connective tissue neoplasm (MONDO_0021581, a Monarch Disease Ontology term). Also known as: connective tissue neoplasm (disease), connective tissue tumor, connective tissue tumour, neoplasm of connective tissue, neoplasm of connective tissues, tumor of connective tissue, tumour of connective tissue.