The second type of swelling associated with cancer is known as ascites, which refers to fluid that has collected in the abdominal cavity.
Left untreated, the painful condition can lead to an infection in the abdomen, or fluid could circulate to the chest and surround the lungs.
Ascites can result from cancer if the disease spreads to the lining of the organs and cause them to leak.
It may also result from a tumour that has spread to the liver, causing pressure to build up inside the organ.
This type of swelling is associated with ovarian, pancreatic, liver, and colon cancer.
source: express.co.uk