Malignant peripheral nerve sheath tumor of the colon in a patient with von Recklinghausen's disease: report of a case.

Malignant peripheral nerve sheath tumor (MPNST) arising from the colon is an extremely rare clinical entity. We report one such case of an adult female with neurofibromatosis type I who presented with pain and a lump in her abdomen. A computed tomographic scan revealed a 10 × 8-cm mass in the splenic flexure of her colon that was compressing its lumen, but the results of a colonoscopy were normal.

Congenital duodenal diaphragm in an adult masquerading as superior mesenteric artery syndrome.

Persistent congenital diaphragm in the second part of the duodenum may rarely present in adults with features of upper gastro-intestinal obstruction. This possibility is often not considered in adults due to delayed onset of symptoms. One such case is reported in a middle aged male who was diagnosed preoperatively with superior mesenteric artery syndrome.