[Primary malignant tumors of the small intestine. A review with demonstration of a case].

Malign tumours in the small bowel are rarely found. A survey is given on appearance, symptoms, diagnosis and therapy of these tumours (by exclusion of the tumours of the duodenum and the tumours derived from Meckel's diverticulum). By means of a case report and a number of observed patients it is demonstrated, how the non-characteristic symptoms cause a late diagnosis and therefore late therapy.