Case Reports in Medicine

Case Reports in Medicine / 2013 / Article

Case Report | Open Access

Volume 2013 |Article ID 609727 |

Maxwel Capsy Boga Ribeiro, Luiz Roberto Lopes, João de Souza Coelho Neto, Valdir Tercioti, Nelson Adami Andreollo, "Gastric Adenocarcinoma after Gastric Bypass for Morbid Obesity: A Case Report and Review of the Literature", Case Reports in Medicine, vol. 2013, Article ID 609727, 4 pages, 2013.

Gastric Adenocarcinoma after Gastric Bypass for Morbid Obesity: A Case Report and Review of the Literature

Academic Editor: Chin-Jung Wang
Received28 Oct 2012
Accepted21 Jan 2013
Published20 Feb 2013


Gastric adenocarcinoma after gastric bypass for morbid obesity is rare but has been described. The diet restriction, weight loss, and difficult assessment of the bypassed stomach, after this procedure, hinder and delay its diagnosis. We present a 52-year-old man who underwent Roux-en-Y gastric bypass 2 years ago and whose previous upper digestive endoscopy was considered normal. He presented with weight loss, attributed to the procedure, and progressive dysphagia. Upper digestive endoscopy revealed stenosing tumor in gastric pouch whose biopsy showed diffuse-type gastric adenocarcinoma. He underwent total gastrectomy, left lobectomy, distal pancreatectomy and splenectomy, segmental colectomy, and bowel resection with esophagojejunal anastomosis. The histopathological analysis confirmed the presence of gastric cancer. The pathogenesis of gastric pouch adenocarcinoma is discussed with a literature review.

1. Introduction

Obesity is a global problem, causing significant morbidity and mortality [1]. Surgery is the only treatment in morbidly obese patients causing effective weight loss and beneficial long-term results. Postoperative outcome assessments have clearly demonstrated the positive effect of bariatric surgery on weight loss and subsequent improvement or resolution of type 2 diabetes, obstructive sleep apnea, hypertension, and dyslipidemias [13]. The original gastric bypass procedure was performed in 1966 by Mason and Ito [4]. The Roux-en-Y gastric bypass (RYGBP) is the most common procedure currently performed for surgical treatment of morbid obesity. Long-term complications may occur after bariatric surgery but cancer is rare [5]. We report a case of gastric adenocarcinoma after RYGBP and a review of the literature.

2. Case Report

A 52-year-old man presented with severe dysphagia 1 month ago. On the examination, only pallor was noted. The laboratory findings were normal, except for a microcytic anemia with hemoglobin 8.9 g/dL. He had undergone RYGBP for the treatment of morbid obesity 2 years ago, with Body Mass Index (BMI) of 42 and type 2 diabetes. An upper digestive endoscopy performed before surgery was considered normal and revealed Helicobacter pylori (Hp) positive. He treated the Hp using amoxicillin and clarithromycin and the endoscopy was repeated showing Hp negative. After surgery he had dietary restriction and lost 40 kg. Upper digestive endoscopy revealed a stricture lesion in the gastric pouch and the biopsies confirmed a signet-cell undifferentiated adenocarcinoma. The computed tomography (CT scan) revealed a large abdominal tumor affecting the excluded stomach and with signs of invasion of the left hepatic lobe and the pancreas (Figure 1).

The patient underwent total gastrectomy, including the excluded stomach, distal pancreatectomy and splenectomy, left hepatectomy and segmental colectomy with Roux-en-Y esophagojejunal anastomosis, and primary colocolic anastomosis because there was true carcinomatosis invasion of adjacent organs (Figures 2 and 3). Twenty-five lymph-nodes were resected and fourteen had metastasis. He had an uneventful postoperative period. Chemotherapy was performed during six months with good tolerance.

After 16 months, the patient was admitted to the emergency with intestinal obstruction. Exploratory laparotomy revealed numerous intestinal adhesions and bowel obstruction at multiple points. He underwent an ileocolic anastomosis. Biopsies of the adhesions were inconclusive. Nevertheless, a PET-CT showed peritoneal carcinomatosis (Figures 4 and 5). Palliative chemotherapy was again introduced. His condition deteriorated, and he died after five months.

3. Discussion

The incidence of esophagogastric cancer after bariatric surgery is rare; however, about 30 cases of adenocarcinoma have been described in the last years [2, 5]. The etiology has not been clearly elucidated, and possible factors could be chronic reflux, stasis of food and acid in the pouch and lower esophagus causing chronic mucosal irritation, and ischemic damage due to the band when it is present [5, 6]. Retrograde gastroscopies of the bypassed stomach after RYGBP (using a pediatric colonoscope) found an 87% incidence of macroscopic gastritis, with microscopic confirmation in 45% of the cases and with progression to intestinal metaplasia in 10% [79].

Endoscopy is considered the most sensitive diagnostic modality to aid in the detection of premalignant dysplasia or malignant gastric lesions [10]. Endoscopic access to the excluded stomach might be possible through the afferent limb of the previously loop gastrojejunostomy or through the Roux limb, although this is technically challenging and can be unreliable [11]. With a routine upper gastrointestinal study, oral contrast is unlikely to reflux up the biliary limb to reach the gastric remnant [7, 9, 12]. CT scanning is and should remain the primary screening modality, where small or early lesions might not be detected [11]. Percutaneous puncture under ultrasound control is possible [13]. Finally, if an endoscopic or radiologic diagnosis cannot be made, access to the excluded stomach should be the next step in the evaluation [14].

There are conditions that have been associated to greater risk of gastric adenocarcinoma, such as family history, blood type-A, hereditary nonpolyposis colon cancer, and the Li-Fraumeni syndrome. There also exist precancerous lesions such as adenomatous polyps, dysplasia, intestinal metaplasia, and Menetrier’s disease. In patients with these conditions with higher risk of developing gastric cancer, a resection of the bypassed stomach can be considered at the time of RYGBP [15].

The diagnosis of esophagogastric malignancies after bariatric procedures can be difficult because weight loss, vomiting, and inability to eat normal quantities of food can be attributed to the expected results of surgery [2, 5].

The cases of gastric carcinomas after bariatric surgeries previously reported by Raijman et al. [13], Lord et al. [16], Khitin et al. [17], Corsini et al. [18], Escalona et al. [15], Watkins et al. [11], and Harper et al. [19] presented a variety of symptoms, but abdominal pain was more frequent, and the usual evaluation methods were unsuccessful in providing a diagnosis. All patients reported were diagnosed with adenocarcinoma in the excluded stomach after laparotomy; therefore, this a difficult diagnosis. In our case, preoperative upper digestive endoscopy was considered normal for 2 years, and after the surgery endoscopy diagnosed the disease, because the tumor invaded the gastric pouch. The same situation was described by Trincado et al. 5 years after gastric bypass [20].

On the other hand, gastric adenocarcinomas have been described after vertical banded gastroplasty (VBG). Ziraik et al. [21], Papakonstantinou et al. [22], Belhaj et al. [23], Jain et al. [6], and Chebib et al. [24], respectively, described gastric adenocarcinomas in patients 2 years, 6 years, 10 years, 15 years, and 18 years after VBG. These authors suggest that these patients should be monitored periodically by endoscopy after operation.

The Helicobacter pylori (Hp) is one of the etiologic factors associated to gastric cancer [25, 26]. Thus, due to the presence of this bacteria in obese population undergoing Roux-en-Y bypass gastric surgery and the concern that it may exacerbate postoperative foregut symptoms and increase gastric cancer risk, this led the surgeons to adopt a policy of Hp systematic eradication preoperatively. Cerqueira et al. suggested that the 14-day triple therapy (proton pump inhibitor, clarithromycin, and amoxicillin) is more effective than 7 days [27].

The authors, in recent publications, advise that an adequate preoperative gastric evaluation by upper digestive endoscopy should be performed on all candidates before surgical treatment for obesity [28].

Finally, there must be a high index of suspicion, if any sign of malignancy was found during an endoscopy, for earlier detection and treatment of gastric carcinoma, improving patient outcomes.


  1. M. D. Lara, S. N. Kothari, and H. J. Sugerman, “Surgical management of obesity: a review of the evidence relating to the health benefits and risks,” Treatments in Endocrinology, vol. 4, no. 1, pp. 55–64, 2005. View at: Publisher Site | Google Scholar
  2. L. A. Korswagen, J. G. Schrama, W. Bruins Slot, and M. A. J. M. Hunfeld, “Adenocarcinoma of the lower esophagus after placement of a gastric band,” Obesity Surgery, vol. 19, no. 3, pp. 389–392, 2009. View at: Publisher Site | Google Scholar
  3. H. Buchwald, Y. Avidor, E. Braunwald et al., “Bariatric surgery: a systematic review and meta-analysis,” JAMA, vol. 292, no. 14, pp. 1724–1737, 2004. View at: Publisher Site | Google Scholar
  4. E. E. Mason and C. Ito, “Gastric bypass in obesity,” Surgical Clinics of North America, vol. 47, pp. 1345–1351, 1967. View at: Google Scholar
  5. R. Kuruba, M. Jawad, R. C. Karl, and M. M. Murr, “Technique of resection of esophageal adenocarcinoma after Roux-en-Y gastric bypass and literature review of esophagogastric tumors after bariatric procedures,” Surgery for Obesity and Related Diseases, vol. 5, no. 5, pp. 576–581, 2009. View at: Publisher Site | Google Scholar
  6. P. K. Jain, B. Ray, and C. M. S. Royston, “Carcinoma in the gastric pouch years after vertical banded gastroplasty,” Obesity Surgery, vol. 13, no. 1, pp. 136–137, 2003. View at: Publisher Site | Google Scholar
  7. E. G. Flickinger, D. R. Sinor, W. J. Pories, R. R. Sloss, H. K. Park, and J. H. Gibson, “bypassed stomach,” American Journal of Surgery, vol. 149, pp. 151–156, 1985. View at: Google Scholar
  8. D. R. Sinar, E. G. Flickinger, H. K. Park, and R. R. Sloss, “Retrograde endoscopy of the bypassed stomach segment after gastric bypass surgery: unexpected lesions,” Southern Medical Journal, vol. 78, no. 3, pp. 255–258, 1985. View at: Google Scholar
  9. M. Sundbom, R. Nyman, and H. Hedenström, “Investigation of the excluded stomach after Roux-en-Y gastric bypass,” Obesity Surgery, vol. 11, pp. 25–27, 2001. View at: Google Scholar
  10. B. J. Dicken, D. L. Bigam, C. Cass, J. R. Mackey, A. A. Joy, and S. M. Hamilton, “Gastric adenocarcinoma: review and considerations for future directions,” Annals of Surgery, vol. 241, no. 1, pp. 27–39, 2005. View at: Publisher Site | Google Scholar
  11. B. J. Watkins, S. Blackmun, and M. E. Kuehner, “Gastric adenocarcinoma after Roux-en-Y gastric bypass: access and evaluation of excluded stomach,” Surgery for Obesity and Related Diseases, vol. 3, no. 6, pp. 644–647, 2007. View at: Publisher Site | Google Scholar
  12. A. Csendes, P. Burdiles, K. Papapietro et al., “Results of gastric bypass plus resection of the distal excluded gastric segment in patients with morbid obesity,” Journal of Gastrointestinal Surgery, vol. 9, no. 1, pp. 121–131, 2005. View at: Publisher Site | Google Scholar
  13. I. Raijman, S. V. Strother, and W. L. Donegan, “Gastric cancer after gastric bypass for obesity: case report,” Journal of Clinical Gastroenterology, vol. 13, no. 2, pp. 191–194, 1991. View at: Google Scholar
  14. M. A. L. Fobi, K. Chicola, and H. Lee, “Access to the bypassed stomach after gastric bypass,” Obesity Surgery, vol. 8, no. 3, pp. 289–295, 1998. View at: Publisher Site | Google Scholar
  15. A. Escalona, S. Guzmán, L. Ibáñez, L. Meneses, A. Huete, and A. Solar, “Gastric cancer after Roux-en-Y gastric bypass,” Obesity Surgery, vol. 15, pp. 423–427, 2005. View at: Google Scholar
  16. R. V. Lord, P. D. Edwards, and M. J. Coleman, “Gastric cancer in the bypassed segment after operation for morbid obesity,” Australian and New Zealand Journal of Surgery, vol. 67, no. 8, pp. 580–582, 1997. View at: Google Scholar
  17. L. Khitin, R. E. Roses, and D. H. Birkett, “Cancer in the gastric remnant after gastric bypass: a case report,” Current Surgery, vol. 60, no. 5, pp. 521–523, 2003. View at: Publisher Site | Google Scholar
  18. D. A. Corsini, C. A. M. Simoneti, G. Moreira, S. E. Lima, and A. B. Garrido, “Cancer in the excluded stomach 4 years after gastric bypass,” Obesity Surgery, vol. 16, no. 7, pp. 932–934, 2006. View at: Publisher Site | Google Scholar
  19. J. L. Harper, D. Beech, D. S. Tichansky, and A. K. Madan, “Cancer in the bypassed stomach presenting early after gastric bypass,” Obesity Surgery, vol. 17, no. 9, pp. 1268–1271, 2007. View at: Publisher Site | Google Scholar
  20. M. Toledano Trincado, J. C. M. Del Olmo, J. García Castaño et al., “Gastric pouch carcinoma after gastric bypass for morbid obesity,” Obesity Surgery, vol. 15, no. 8, pp. 1215–1217, 2005. View at: Publisher Site | Google Scholar
  21. C. Zirak, J. Lemaitre, E. Lebrun, S. Journé, and P. Carlier, “Adenocarcinoma of the pouch after silastic ring vertical gastroplasty,” Obesity Surgery, vol. 12, no. 5, pp. 693–694, 2002. View at: Publisher Site | Google Scholar
  22. A. Papakonstantinou, P. Moustafellos, I. Terzis, C. Stratopoulos, and E. I. Hadjiyannakis, “Gastric cancer occurring after vertical banded gastroplasty,” Obesity Surgery, vol. 12, no. 1, pp. 118–120, 2002. View at: Publisher Site | Google Scholar
  23. A. Belhaj, L. Memmo, A. Mehdi, F. Mboti, and J. Closset, “Gastric adenocarcinoma following “silastic vertical ring gastroplasty”: case report,” Revue Medicale de Bruxelles, vol. 31, pp. 459–462, 2010. View at: Google Scholar
  24. I. Chebib, P. L. Beck, N. G. Church, and S. A. C. Medlicott, “Gastric pouch adenocarcinoma and tubular adenoma of the pylorus: a field effect of dysplasia following bariatric surgery,” Obesity Surgery, vol. 17, no. 6, pp. 843–846, 2007. View at: Publisher Site | Google Scholar
  25. S. Nagini, “Carcinoma of the stomach: a review of epidemiology, pathogenesis, molecular genetics and chemoprevention,” World Journal of Gastrointestinal Oncology, vol. 4, pp. 156–169, 2012. View at: Google Scholar
  26. A. Csendes, A. M. Burgos, G. Smok, and M. Beltran, “Endoscopic and histologic findings of the foregut in 426 patients with morbid obesity,” Obesity Surgery, vol. 17, no. 1, pp. 28–34, 2007. View at: Publisher Site | Google Scholar
  27. R. M. Cerqueira, M. C. Manso, M. R. Correia et al., “Helicobacter pylori eradication therapy in obese patients undergoing gastric bypass surgery—fourteen days superior to seven days?” Obesity Surgery, vol. 21, pp. 1377–1381, 2011. View at: Google Scholar
  28. M. A. Küper, T. Kratt, K. M. Kramer et al., “Effort, safety, and findings of routine preoperative endoscopic evaluation of morbidly obese patients undergoing bariatric surgery,” Surgical Endoscopy, vol. 24, pp. 1996–2001, 2010. View at: Google Scholar

Copyright © 2013 Maxwel Capsy Boga Ribeiro et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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