[Stromal tumour of duodenal autonomous nerves (plexosarcoma)].

Gastrointestinal tumours arising from autonomous nerves of Meisner's or Auerbach's plexus (plexomas and plexosarcomas) are rare tumours in only 87 cases described in the literature up to 2001. We present a very rare case of gastrointestinal stromal tumour (plexosarcoma) of the third and fourth portion of the duodenum, 130 x 98 x 87 mm in diameter, arising from its back wall, with central necrosis of the well circumscribed tumour, which communicated with the duodenum through an ulceration of 15 x 7mm in diameter, spreading towards the great vessels of the retroperitoneum. It was gradually and carefully removed, together with 17 cm of the duodenum and few centimetres of the jejunum with end-to-end duodenojejunostomy below the Vater's papilla. During the removal of the tumour, the superior mesenteric artery, being within the tumour's capsule, was accidentally ligated but not transsected. In spite of the removal of the ligature, the artery became thrombosed due to damage of the intima by ligature so that it had to be resected and reanastomosed. After otherwise uneventful recovery, except for a mild pus discharge through the drain, not far from the arterial anastomosis, the patient suddenly started bleeding on the 13th day after surgery. At emergency reoperation, a rupture of the mesenteric artery above the thrombosed anastomosis was found. In spite of absence of the arterial pulsation within the mesentery, the bowel looked vital and the back flow from the artery was satisfactory. The arterial rereconstruction was not possible, so the artery was ligated. The postoperative recovery was surprisingly uneventful. The patient was discharged ten days after surgery and has stayed symptom-free so far.