Small intestinal @entity3 from primary @entity2 is infrequent and seen at the terminal stage of the disease as the first sign. These @entity1 are often present as perforation and @entity298 but rarely with @entity1744 . We reported a case of a 61-year-old @entity1 who was admitted to our hospital with acute @entity490 . Abdominal X-ray manifested an acute ileus. Ileoileal resection-anastomosis was performed after removal of two separate @entity5 in the small intestine. Histopathological result indicated @entity420 . The @entity1 had not been diagnosed as any @entity189 or @entity358 previously. The postoperative thorax computed tomography scan showed a lesion at the right lung, which was pathologically defined as @entity2220 by bronchial brushing. This case is reported to arouse a clinical suspicion of intestinal @entity3 in undiagnosed primary @entity2 presenting with acute @entity490 . Early diagnosis and treatments are vital for improving survival of the @entity1 .

Undiagnosed primary XXXX with initial manifestation of intestinal obstruction: A case report and literature review.

@entity1 :: ('9606', 'Species') :: ['patients', 'patient', 'man'] @entity2220 :: ('MESH:C538231', 'Disease') :: ['adenocarcinoma of the lung'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumors'] @entity2 :: ('MESH:D008175', 'Disease') :: ['lung cancer', 'lung carcinoma'] @entity189 :: ('MESH:D002277', 'Disease') :: ['carcinoma'] @entity420 :: ('MESH:D000230', 'Disease') :: ['metastatic adenocarcinoma'] @entity358 :: ('MESH:D008171', 'Disease') :: ['lung disease'] @entity3 :: ('MESH:D009362', 'Disease') :: ['metastasis'] @entity490 :: ('MESH:D015746', 'Disease') :: ['abdominal pain'] @entity1744 :: ('MESH:D043183', 'Disease') :: ['small bowel obstruction'] @entity298 :: ('MESH:D010538', 'Disease') :: ['peritonitis']
@entity2 :: (MESH:D008175,Disease) :: ['lung carcinoma']
