Primary @entity5 of the small intestine are uncommon. This infrequency and possible lack of awareness can result in a late diagnosis and a poor survival time. In a period of 34 years, only 55 @entity1 were seen at our @entity5 institute. The average age of the @entity1 was 56 years, with a male predominance ratio of 2.6:1.0. Twenty-one @entity1 had @entity420 , 19 had @entity242 and 15 had @entity4303 . The most common signs and symptoms were @entity490 and obstruction of the intestine. Preoperative diagnosis was established in 12 of these @entity1 only by roentgenologic barium examination of the small intestine. At the time of diagnosis, 34 of the @entity1 had @entity3 to regional lymph nodes or distant organs. The median and five year survival times were one year and 19 per cent, respectively. @entity1 with @entity4303 had better survival rates than those with @entity420 or @entity242 . Palliative resection did not improve survival time. However, if other therapeutic modalities also were used, it might prove beneficial. @entity1 with palpable abdominal masses or intestinal @entity548 , or both, had a worse prognosis than did those presenting with obstruction of the intestine because these are late presenting symptoms. Therefore, recurrent @entity490 should increase clinical suspicion, and early diagnosis by careful examination of the small intestine with barium contrast material could improve the survival time. Finally, it seemed that these @entity5 had a high incidence of coexisting malignant conditions, as nine of the @entity1 in our series had a second @entity5 .

Primary XXXX of the small intestine.

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients'] @entity242 :: ('MESH:D012509', 'Disease') :: ['sarcomas'] @entity548 :: ('MESH:D006470', 'Disease') :: ['bleeding'] @entity5 :: ('MESH:D009369', 'Disease') :: ['malignant tumors', 'cancer', 'malignant tumor', 'tumors'] @entity4303 :: ('MESH:D002276', 'Disease') :: ['carcinoids'] @entity490 :: ('MESH:D015746', 'Disease') :: ['abdominal pain'] @entity3 :: ('MESH:D009362', 'Disease') :: ['metastasis'] @entity420 :: ('MESH:D000230', 'Disease') :: ['adenocarcinomas']
@entity5 :: (MESH:D009369,Disease) :: ['malignant tumors']
