It is important to note that these tumors do not always have gastric origins: 76% originate in the stomach, 11% in the bowel, 4% come from breast cancer, 3% from the biliary system, 3% from the cecal appendix and the remaining 3% come from the pancreas, cervix, bladder and renal pelvis. About 80% are bilateral.
Es importante resaltar que el origen de estos tumores no es solo gástrico: el 76% son del estómago; el 11%, intestinales usualmente de colon y recto; el 4%, de seno; el 3%, del sistema biliar; el otro 3%, del apéndice cecal; y el 3 % restante, delpáncreas, cuello uterino, vejiga o pelvis renal 19.