Source:http://linkedlifedata.com/resource/umls/id/C0036221
MSH: A unifocal malignant tumor that consists of atypical pathological MAST CELLS without systemic involvement. It causes local destructive growth in organs other than in skin or bone marrow.,NCI: A rare entity characterized by localized but destructive growth of a tumor consisting of highly atypical, immature mast cells.(WHO, 2001)