A biloma or biliary cyst is a collection of bile inside the abdomen that has become encapsulated with epithelial cells. There are a number of situations that can contribute to the formation of this type of cyst, and there are several treatment options available, depending on its location, size, and severity. Symptoms associated with a biliary cyst can vary, with some patients experiencing issues like abdominal pain and tenderness or symptoms such as fever and confusion, if the cyst becomes infected.