This case is remarkable due to stone size and extension of the duodenal defect. To our knowledge this is the first time a duodenal defect of this size and location was covered using transposition of transected distal stomach. The dimension of the retrieved stone with a size of 12.5 x 5.5 x 5 cm and weighing 180 grams make it a rarity. The biggest stone previously documented in the literature had a size of 10 cm . Bouveret ’s syndrome, describing the symptoms related to upper intestinal gallstone obstruction was first described in the 17th century by Bartolin. Later Leon Bouveret published two cases in Revue de Medicine in 1896 . Until 1993 about 300 cases have been reported in the literature .
In our case the patient suffered from postprandial fullness as a symptom of intestinal obstruction only a couple of days before the acute event. Diagnosis was made by endoscopy during the hemorrhagic shock. Gallstone related hemorrhage has been previously described in only a few cases. Of course, as part of the stone penetration bleeding from the gallbladder, the duodenal wall or from the cystic artery can arise [2, 4, 5, 6, 7]. The endoscopic image may lead to misinterpretation diagnosing only a penetrating duodenal peptic ulcer .
Usually when duodenal penetration by a gallstone occurs the stone’s size is usually only about 2.5 cm in diameter and typically results in a gallstone ileus . The resulting cholecystoduodenal fistula can frequently be closed by direct suture repair. Larger tissue defects of the anterior duodenal wall (> 3 cm) are problematic, especially when mobilization of the duodenum by Kocher maneuver is impossible due to inflammatory tissue conditions [1, 10, 11] A number of different surgical techniques for duodenal closure have been described [1, 12, 13]. The classic surgical technique, Graham patch , was not possible in this case due to the defect's size. Jani et al. demonstrated in a prospective randomized study of 100 patients with duodenal perforation and defect size of 2 to 3 cm that using either a Graham patch or a omentum plug that the omentum plug lead to less postoperative leaks and overall decreased mortality . Therefore the omentum plug is a promising treatment approach for a duodenal perforation size of 2 to 3 cm. However in this case the defect exceeded this dimension and using an omentum plug would have led to complete obstruction of the duodenum. In 2009 Lal et al. described the method of tube duodenostomy for the management of giant duodenal ulcer perforation. This group reported the outcomes of 20 patients treated by gastroduodenostomy and draining the digestive fluids by placing a gastric, a retrograde duodenal tube and inserting additionally a jejunal feeding tube and had a great outcome. The first step in this surgical approach was the Kocher maneuver of the duodenum decreasing tension at the repair site , this was not possible in our case, we required an adequate amount of well mobilized tissue material to cover the defect and therefore we mobilized and transected the pyloric antrum and used it as a flap instead.
This technique has so far not been mentioned in the literature and therefore we consider it unique. The principles of decompressing the duodenum and achieving a tension-free anastomosis are preserved by this surgical technique. Decompression of the duodenum is achieved by bile draining using a T-tube and by dividing the stomach. By transecting the distal stomach the passage of food is avoided and the critical anastomosis in the duodenum only has contact with pancreatic secretions. Previously described methods to achieve the same goal include gastric resection, stomach partition by stapling, gastroenterostomy, or a choledochojejunostomy or by draining the stomach and the duodenum [10, 11, 17]. Further approaches in treating duodenal defects are using Roux-en-Y reconstructions or a pedicled stomach flap. Until now the latter method has only been explored experimentally [12, 18]. In our approach we used the pedicled distal stomach which leads to a very good result. Even in extreme inflamed conditions of the duodenal region, the stomach is usually not affected. The crucial prerequisite to perform a gastoduodeno-plasty is the integrity of the right gastroepiploic arcade. By preserving these vessels, almost any portion of the stomach can be used to cover a duodenal wall defect. The 180° rotation of the stomach did not affected the stomach perfusion at any time.
The reconstruction of the gastrointestinal tract was intentionally performed using the first jejunal loop according to Billroth II in modification of von Mikulicz-Radecki. This gastrojejunostomy allows the duodenum to be reached endoscopically using a retrograde technique. Six weeks after surgery we performed a follow-up endoscopy; the blind end of the duodenum which is covered by the distal stomach could easily be accessed. The transduodenal sphincteroplasty was widely patent and easily catherterized. In the area of the gastroduodeno-plasty no mucosal inflammation or ulceration were observed and normal histopathology was reported from the routine surveillance biopsies
Possible criticism of this technique is the alteration of the pathophysiological conditions within in the new duodenum following the gastroduodeno-plasty. Due to the direct contact of the pyloric antrum mucosa to the alkaline duodenal secretions a significant increase in gastrin stimulation would be expected leading to an increased risk of peptic lesions in the gastrointestinal anastomosis or jejunum. This hypothesis is supported by animal studies on the pathophysiology of ulcer formation conducted in the 70’s and 80’s . However, in our case we treated our patient with 6 weeks of proton pump inhibitor medication; following this the medication was ceased. Serum gastrin levels taken at 6 weeks and 6 months both revealed normal levels; therefore we conclude that the expected effect is not significant.