Budgerigars can develop lumps,these can be on the outside or inside of the birds body.
Remember these lumps may not be tumours.
Often a lump can just be an abscess,these are areas of tissue which may be swollen
and inflamed due to a bacterial infection.we can often see a fat bird and our first
thoughts are cancer whereas it is nothing more than a large deposit of fat beneath
the skin.If the fat bird is a female, the lump we are concerned about may be an egg.
Swellings,lumps and growths can be a diseased kidney or liver which is enlarged.
Many times the bump is a cyst,a tissue sac filled with fluid or other loose substance.
I have a bird at the moment with a feather cyst,this is caused when a new feather
is soft and cannot break through the skin,this cyst then fills up with keratin .
Cysts are not cancerous - they may fill up with more fluid and get bigger,
but they will not grow and spread like a tumour.