For some genes, the symbol might still be valid, although they are not HGNC approved. This is the case for LOC genes and Corf genes.
This variant for instance, wasn't valid in the april release:
hg19 2 NC_000002.11:g.88019368G>A LOC730268
Currently it does have a valid HGNC symbol, but this can happen again in the future for other genes.
For some genes, the symbol might still be valid, although they are not HGNC approved. This is the case for LOC genes and Corf genes.
This variant for instance, wasn't valid in the april release:
hg19 2 NC_000002.11:g.88019368G>A LOC730268
Currently it does have a valid HGNC symbol, but this can happen again in the future for other genes.More info