An abdominal tumor is an abnormal growth of tissue in the abdominal cavity. There are many different types of abdominal tumors, and they can be benign (non-cancerous) or malignant (cancerous). Tumors can develop anywhere in the abdominal cavity, including the stomach, intestines, liver, pancreas, and other organs. They can also occur in the lymph nodes and other tissues in the abdomen. Most abdominal tumors are benign, but some can be cancerous. If a tumor is cancerous, it can grow and spread to other parts of the body. Surgery is the most common treatment for abdominal tumors. The type of surgery depends on the type and location of the tumor. Some tumors can be removed with a simple surgery, while others may require more extensive surgery. In some cases, chemotherapy or radiation therapy may be necessary. If you have been diagnosed with an abdominal tumor, your doctor will work with you to develop a treatment plan that is right for you.