[Genome] HGNC or HUGO Symbols

[SiddarthGautham Selvaraj]

Hi:

I am using the hg18 database. I am using only the gene symbol field of the
table KgXref.

You can find entries like MARCH1, MARCH5, etc. The gene symbol field also
has entries like C10orf10, etc.

I have learnt that the field contains actual gene symbols, sometime
swiss-prot id and sometimes something else.

Under what consitions, values other than gene symbol are given in the 'Gene
Symbol' field of the table KgXref?

Also please let me know if some table has the HGNC symbols or HUGO symbols
so that I can extract exactly those entries that have Gene symbols in the
field 'gene symbol' of the table KgXref.

Thanks
siddarth