Source:http://linkedlifedata.com/resource/umls/id/C0037114
MSH: A broad family of synthetic organosiloxane polymers containing a repeating silicon-oxygen backbone with organic side groups attached via carbon-silicon bonds. Depending on their structure, they are classified as liquids, gels, and elastomers. (From Merck Index, 12th ed),NCI: A synthetic gel that is used as an outer coating on breast implants and as the inside filling of some implants.