J Ped Surg Case Reports 1 (2013) 39e41

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Giant ileal duplication cyst presenting as malrotation

George Virich a,*, David Girvan b, Neil Merritt c a Department of General Surgery, Western University, 1151 Richmond Street, London, Ontario N6A3K7, Canada b Division of Pediatric Surgery, Department of Surgery, Western University, Children’s Hospital of Western Ontario, 800 Commissioners Road East, London, Ontario N6A 5W9, Canada c Division of Pediatric Surgery, Department of Surgery, Western University, Children’s Hospital of Western Ontario, Room B1-180, 800 Commissioners Road East, London, Ontario N6A 5W9, Canada article info abstract

Article history: Introduction: Alimentary Tract Duplications (ATDs) are rare anomalies. The is the most common Received 5 February 2013 site. Completely isolated ileal duplication cysts (IDCs) are a small subgroup of IDCs that do not Received in revised form communication with the . These cysts may manifest in a variety of ways. 21 February 2013 Presentation of case: We discuss a six-day-old female infant who presented with clinical and radiologic Accepted 21 February 2013 features of malrotation. At the time of the bowel rotation was found to be normal, however an isolated IDC was found and resected. Discussion: Ileal duplication cysts often present with . In rare cases these can present Key words: Ileal with features of malrotation on upper gastrointestinal contrast series, thus detracting from the real Duplication pathology. Cyst Conclusion: We identify a rare case of completely isolated IDC presenting as malrotation in a six-day-old female infant, which was promptly recognized and surgically managed. We suspect that the weight of the duplication cyst displaced the bowel inferiorly and thus gave the radiographic appearance of mal- rotated bowel. Crown Copyright Ó 2013 Published by Elsevier Inc. All rights reserved.

Alimentary Tract Duplications (ATDs) are rare anomalies, with followed by three episodes of bilious vomiting. She was exclusively an incidence of 1 in 4500 individuals [1]. The ileum is the most breast fed and had passed within 2 h of birth. Prenatal common site, while rectal, duodenal, gastric and cecal duplications history and imaging at 20 weeks gestation were completely normal. are extremely rare [2,3]. Her parents were both healthy, and her 2-year old sister was born Ileal duplication cysts (IDCs) are enteric cysts that are hollow, with no congenital abnormalities. epithelium-lined, cystic or tubular structures. IDCs may or may not At presentation she weighed 3810 g. Her vitals were as follows; communicate with a portion of the gastrointestinal tract. If there is rectal temperature 37.7, pulse rate 132, blood pressure 109/ no communication with the gastrointestinal tract, these cysts are 70 mm Hg, respiratory rate 42 and oxygen saturation 96% on room considered sequestered or isolated. Ileal duplication cysts most air. She appeared well. There were no signs of dehydration. She was frequently present with clinical features of a bowel obstruction but not in obvious pain. Her cardiorespiratory exam was unremarkable. can also present with bleeding or perforation. Her abdominal exam revealed a soft, non-tender, distended We discuss a rare case of an IDC presenting with radiographic abdomen without a palpable dominant mass. There were no and clinical features of malrotation in a six-day-old female infant. hernias. We inserted a nasogastric tube and it drained minimal This is the first case of IDC presenting as clinical and radiographic amounts of non-bilious gastric contents. malrotation described in the literature. Hematologic and biochemical parameters were normal except for a mixed picture of acute respiratory alkalosis and metabolic 1. Presentation of a case acidosis presumed secondary to her abdominal pathology. Abdominal X-rays (AXR) (Fig. 1) demonstrated a paucity of A six-day-old term female infant born at 40 weeks and 2 days bowel gas in the right lower quadrant with mildly dilated loops of fi fi presented at our institution with 48 h of abdominal distention bowel. The abdominal lms were abnormal but nonspeci c. AXR was followed by upper gastrointestinal (UGI) series (Fig. 2), which demonstrated many of the radiographic features of malrotation * Corresponding author. Tel.: þ1 226 448 0044. without obvious volvulus. These features included duodenal E-mail address: [email protected] (G. Virich). redundancy, duodenojejunal junction malposition, a nonascending

2213-5766/$ e see front matter Crown Copyright Ó 2013 Published by Elsevier Inc. All rights reserved. http://dx.doi.org/10.1016/j.epsc.2013.02.012 40 G. Virich et al. / J Ped Surg Case Reports 1 (2013) 39e41

Fig. 3. Intraoperative photograph taken demonstrating the cyst as part of the small bowel.

duodenojejunal junction, stomach and duodenal distention, and gastroesophageal reflux. Based on the contrast study, a diagnosis of malrotation without volvulus was made. The significance of the UGI could not be overlooked and thus we decided to explore the abdomen immediately. However, given the patient’s stable condition and a benign abdomen, we felt comfortable with the laparoscopic approach as an initial procedure. At laparoscopy we found excessive amounts of serous fluid in the pelvis and chyle in the of the small bowel. On running the bowel we discovered two loops of small bowel physi- cally attached to each other; one loop appeared pink, healthy and decompressed while the other had a distended appearance. The rotation of the bowel could not be confidently assessed at lapa- roscopy. A decision to convert to laparotomy was made due to the limited abdominal domain and inability to identify the rotation of Fig. 1. Abdominal X-rays demonstrating paucity of gas in the right lower quadrant. the bowel. Once the bowel was eviscerated we determined that the rota- tion was normal but immediately discovered an isolated ileal duplication cyst (Fig. 3). A 30 cm long cyst starting 45 cm from the ileocecal valve was observed (Fig. 4). The cyst was intimately attached to the normal ileum. With careful dissection we were able to separate the isolated duplication cyst. The postoperative period was uneventful. The patient was dis- charged home on postoperative day six, and the child is well at three months of age. The histopathological examination showed histologically normal intestinal wall. It showed congested serosa, areas of flat- tened and dilated mucosa. There were no tumors present. Focal areas of mucosal squamous metaplasia were noted (Fig. 5).

Fig. 2. Upper gastrointestinal series examination demonstrating abnormal position of the ligament of Treitz. Fig. 4. Intraoperative photograph taken demonstrating the cyst in isolation. G. Virich et al. / J Ped Surg Case Reports 1 (2013) 39e41 41

difficult. Normal bowel is often resected en bloc with the cyst, followed by anastomosis of the normal bowel. Different surgical techniques have emerged depending on the size of the cysts and whether or not gastric mucosa is present within the cyst [4,14,15].

3. Conclusion

We identify a case of an ileal duplication cyst in a six-day-old female infant who presented with both clinical and radiographic features of small bowel malrotation and intermittent volvulus. Small bowel duplication cysts can be misdiagnosed as malrotation because the weight and volume of the duplication cyst can change the position of the duodenojejunal junction and the remaining small bowel. Until now, this has been an undescribed presentation of an isolated ileal duplication cyst.

Consent statement

Written informed consent was obtained from the parent for Fig. 5. Histopathological section demonstrating histologically normal intestinal publication of this case report and accompanying images. A copy of wall, congested serosa, areas of flattened and dilated mucosa, and absence of tumors. the written consent is available for review by the Editor-in-Chief of this journal on request. 2. Discussion Conflict of interests statement Alimentary duplications are rare cystic lesions that occur at any The authors declare that there are no conflicts of interests. point in the alimentary tract. Roughly half are small bowel dupli- cations with most of these being ileal duplication cysts [4,5]. References Although ileal cysts of over 60 cm in length have been reported most are less than 10 cm [6]. [1] Jancelewicz T, Simko J, Lee H. Obstructing ileal duplication cyst infected with Salmonella in a 2-year-old boy: a case report and review of the literature. J Patients with ileal duplication cysts can present with vomiting, Pediatr Surg 2007;42:E19e21. constipation, or abdominal distension and are often diagnosed [2] Corroppolo M, Zampieri N, Erculiani E, Cecchetto M, Camoglio FS. Intussus- following development of complications including gastrointestinal ception due to a cecal duplication cyst: a rare cause of acute abdomen. Pediatr Med Chir 2007;29:273e4. hemorrhage, intussusception, volvulus, or bowel perforation [7]. [3] Sinha A, Ojha S, Sarin YK. Completely isolated, noncontiguous duplication cyst. Our patient presented with bowel obstruction and subsequent Eur J Pediatr Surg 2006;16:127e9. radiologic investigations suggested this was secondary to malro- [4] Wrenn EL. Alimentary tract duplications. In: Holder TM, Aschcraft KW, editors. Pediatric surgery. Philadelphia: Saunders; 1980. p. 445e56. tation and intermittent volvulus. We suspect the weight and [5] Bower RJ, Sieber WK, Kiesewetter WB. Alimentary tract duplications in chil- volume of the isolated duplication cyst changed the position of the dren. Ann Surg 1978;188:669e74. normal bowel as well as the duodenojejunal junction, which led to [6] Balén EM, Hernández-Lizoáin JL, Pardo F, Longo JM, Cienfuegos JA, Alzina V. Giant jejunoileal duplication: prenatal diagnosis and complete excision a misdiagnosis of malrotation. without intestinal resection. J Pediatr Surg 1993;28:1586e8. Although histologically benign, the epithelial lining of an IDC [7] Islah MA, Hafizan T. Perforated ileal duplication cyst presenting with right iliac contains ectopic acid-secreting mucosa in more than 50% of cases fossa pain mimicking perforated appendicitis. Med J Malaysia 2008;63:63e4. [8] Mellish RWP, Koop CE. Clinical manifestations of duplication of the bowel. and this can be a cause of ulceration, bleeding, or transmural Pediatrics 1961;27:397e407. erosion [8]. Other abnormalities reported in association with small [9] Favara BE, Franciosi RA, Akers DR. Enteric duplications. 37 cases: a vascular bowel duplication cysts include omphalocoele, intestinal atresia, theory pathogenesis. Am J Dis Child 1971;122:501e6. intestinal , and malrotation of the midgut [9,10]. [10] Basu R, Forshall I, Rickham PP. Duplication of the alimentary tract. Br J Surg 1960;47:477e84. The diagnosis of IDC can be made by ultrasound, which is reli- [11] Ros PR, Olmsted WW, Moser Jr RP. Mesenteric and omental cysts: histologic able in differentiating them from mesenteric cysts, which have classification with imaging correlation. Radiology 1987;164:327e32. ’ a thinner wall [11]. Prenatal US diagnosis has also been reported [6]. [12] Raffensperger JG. Swenson s pediatric surgery (ed. 5). Norwalk, CT: Appleton & Lange; 1990. p. 579e85. Plain abdominal X-rays, upper GI series, and barium enema can [13] Grosfeld JL, O’Neill JA, Clatworthy Jr H. Enteric duplications in infancy and differentiate this condition from a volvulus, intestinal atresia, childhood. Ann Surg 1970;172:83e90. stenosis, or other congenital bowel obstruction [12,13]. [14] Jewett Jr TC. Duplication of the entire with massive melena. Ann Surg 1958;147:239e44. Treatment consists of cyst resection with preservation of the [15] Wrenn Jr EL. Tubular duplication of the small intestine. Surgery 1962;52: normal bowel whenever possible, although this can be extremely 494e9.