An extraskeletal chondroma usually arising from the dura. The disease is Monarch Disease Ontology id MONDO_0002779 (central nervous system chondroma). Also known as: CNS chondroma, CNS osteochondroma, central nervous system osteochondroma, chondroma of CNS, chondroma of central nervous system, chondroma of the CNS, chondroma of the central nervous system, osteochondroma of CNS.