Hi, Thanks for writing in. Colorectal cancer is cancer of the large bowel which is usually of adenocarinoma type. Melanoma colorectal cancer is a rare type that is associated with pigment forming cancer of the colon. This is an aggressive cancer and can spread quickly to other parts of the body. If your friend has melanoma colorectal cancer then it is possible that the cancer might have spread to other organs. A melanoma colorectal cancer might spread to liver, peritoneum, lungs, bones and brain. Since she is having fluid collection in the abdomen therefore metastasis to peritoneum might be present. Melanoma colorectal cancer spreads too fast and sometimes even doctors are able to make a confirmed diagnosis only when it has reached the later stages. Your friend might require a whole body PET CT scan to know the spread of cancer and then treatment with chemotherapy might be suggested. Draining the fluids is not a permanent cure. Please do not worry.