The following code indicates the type of mutation; the following number (or X or Y) indicates the chromosome involved.
- P - Point mutation, or any insertion/deletion entirely inside one gene.
- D - Deletion of a gene or genes.
- C - Whole chromosome extra, missing, or both.
Note: unspecified information in the above means either that the information is currently not known, or more likely that no-one in Wikipedia has gotten around to entering it.