Sigmoid plasmacytoma mimicking colon cancer in a patient with multiple myeloma: case report and review of literature

Congenital duodenal occlusion presenting as a neonatal emergency may be caused by a diaphragm or a complete obliteration of the duodenal lumen. Complete obliteration may result from vascular occlusion in utero. A diaphragm may represent incomplete vacuolation of the proliferating epithelial lining of the duodenum between the sixth and eighth weeks of gestation. 1 If the occlusion caused by the diaphragm is complete, symptoms appear from birth. In some cases, a lumen persists in the diaphragm, and presentation is delayed. The lumen is rarely wide enough to avoid symptoms or for symptomstobedelayeduntiladultlife.Thehistoryinadults isusuallyoneofpersistent vomitingandweightloss.Twenty adult patients with duodenal web were reported in a large series of congenital duodenal anomalies from one center in the United States. 3 The onset of symptoms in adult life seems to be the effect of progressive decompensation of the peristaltic force of the stomach and proximal duodenum.