[A benign or malignant tumor that arises from mesenchymal cells in extra skeletal sites. The most common types are lipomatous (fatty), vascular, smooth muscle, fibrous, and fibrohistiocytic neoplasms. — 2003 ( NCI )]
UMLS (NCI) C0037579 Relation/PAR: Neoplasm by Site
Relation/CHD: Muscle Neoplasm
blood vessel neoplasm