Monarch Disease Ontology id MONDO_0006423 (soft tissue chondroma) is a benign neoplasm arising from the extraskeletal soft tissues near tendons and joints. It is a well circumscribed tumor characterized by the presence of chondrocytes, a lobulated hyaline cartilage growth pattern, and in some cases calcification. Also known as: chondroma of soft parts, extraskeletal chondroma, extraskeletal osteochondroma.