The fact that cancer can remain asymptomatically for years, the tumor can grow significantly in volume or spread to other tissues before it is diagnosed. The cancer can spread by direct extension or through the lymphatic circulation to form metastasis in other organs such as pelvis and stomach.
To avoid complications, if you experience symptoms related to fallopian cancer, consult your doctor immediately. However, although these symptoms can indicate they disease, they do not necessarily mean that you have fallopian cancer. See your doctor before assuming anything.