Source:http://linkedlifedata.com/resource/umls/id/C1956002
MSH: A mutation named with the blend of insertion and deletion. It refers to a length difference between two ALLELES where it is unknowable if the difference was originally caused by a SEQUENCE INSERTION or by a SEQUENCE DELETION. If the number of nucleotides in the insertion/deletion is not divisible by three, and it occurs in a protein coding region, it is also a FRAMESHIFT MUTATION.,NCI: A mutation class that includes insertion mutations, deletion mutations and mutation events where both an insertion and a deletion has occurred.