Tumours and Cancers usually occur in older hamsters. It is more common in females than in males. However, not to mislead hamsters owners, it does happen to males too.
Internal tumours such as those involving internal organs, for example lungs, heart, kidney, may be difficult to treat. However, many external tumours can be successfully surgically removed by vets.
A hamster suffering from tumour and/or cancer may develop a hard lump which can increase in size quite quickly. It is often difficult to distinguish between a tumour and an abscess. A tumour may be accompanied by fur loss, lethargy, poor condition or wasting, however not all cases are accompanied with those symptons.
It is highly recommended that hamsters are brought in to animal hospital for higher chances of curing, on discovery of any lump. Veterinary advice should be sought immediately as early diagnosis increases the chances of success of surgical removal of tumours.
Due to their small size, there are always risk involved from the anaesthetic required to carry out surgery. However, many elderly hamsters have succesfully undergone surgery of this kind.
May health be with your pet.