Foregut duplication of the stomach diagnosed by endoscopic ultrasound guided fine-needle aspiration cytology: case report and literature review
- Vincenzo Napolitano1,
- Angelo M Pezzullo1,
- Pio Zeppa2,
- Pietro Schettino1,
- Maria D’Armiento2,
- Antonietta Palazzo1,
- Cristina Della Pietra1,
- Salvatore Napolitano1 and
- Giovanni Conzo1Email author
© Napolitano et al; licensee BioMed Central Ltd. 2013
Received: 24 May 2012
Accepted: 18 January 2013
Published: 2 February 2013
Gastric duplication cyst (GDC) with a pseudostratified columnar ciliated epithelium is an uncommon malformation supposed to originate from a respiratory diverticulum arising from the ventral foregut. Morphologic appearance of GDCs is variable, depending on the density of their contents. GDCs are often misdiagnosed as solid masses by imaging techniques, and as a consequence they may be wrongly overtreated. We report our case of a 56-year-old man with a 5 cm hypoechoic mass of the gastroesophageal junction, incidentally detected by transabdominal ultrasonography. Neither transabdominal ultrasonography nor magnetic resonance clearly outlined the features of the lesion. The patient underwent endoscopic ultrasound (EUS), which showed a hypoechoic mass arising from the fourth layer of the anterior gastric wall, just below the gastroesophageal junction. According to EUS features, a diagnosis of gastrointestinal stromal tumor was suggested. EUS-guided fine-needle aspiration cytology revealed a diagnosis of GDC with pseudostratified columnar ciliated epithelium. We therefore performed an endoscopically-assisted laparoscopic excision of the cyst.
In conclusion, whenever a subepithelial gastric mass is found in the upper part of the gastric wall, a duplication cyst, although rare, should be considered. In this case, EUS-guided fine-needle aspiration cytology could provide a cytological diagnosis useful to arrange in advance the more adequate surgical treatment.
KeywordsGastric duplication cyst Foregut duplication cysts Pseudostratified columnar ciliated epithelium Laparoscopic surgery Endoscopic ultrasound-guided fine-needle aspiration cytology
foregut duplication cyst
fine-needle aspiration cytology
gastric duplication cyst
gastrointestinal stromal tumor.
Duplications of the alimentary tract are relatively rare congenital anomalies. Those located in the stomach are very uncommon, constituting between 4 and 9% of all intestinal duplications . The structure of a gastric duplication cyst (GDC) consists of a smooth muscle coat lined by a mucous membrane, in most cases containing a typical gastric epithelium , although a small intestinal or colonic mucosa may also be present. Generally, they are single and do not communicate with gastric lumen. Exceptionally, in GDCs a pseudostratified columnar ciliated epithelium, more commonly present in the esophageal duplication cysts, can be found. According to Cunningham and colleagues , GDCs lined by pseudostratified columnar ciliated epithelium could be better defined as foregut duplication cysts (FDCs) of the stomach.
Diagnosis of a gastric duplication may be difficult even using the most advanced imaging techniques, including endoscopic ultrasound (EUS) [4–6]. Here we report a case of GDC with respiratory epithelium, misdiagnosed as a gastrointestinal stromal tumor (GIST) at EUS. The EUS-guided fine-needle aspiration subsequently performed led to a definite preoperative diagnosis, allowing a proper conservative endoscopically-assisted laparoscopic resection of the cyst.
A 56-year-old man, with a history of B-related chronic hepatitis under antiretroviral treatment, was referred to our surgical department by the Infectious Diseases Unit, where he was under follow-up. The patient did not complain of any symptom concerning the gastrointestinal tract. During an abdominal ultrasonography, a hypoechoic round-shaped mass 4.7 cm in size, with regular margins, located between the left lobe of the liver and the anterior surface of the pancreatic body, was found. Magnetic resonance imaging confirmed the presence of a cystic mass with complex content, located anteriorly to the gastroesophageal junction.
Later on, the patient underwent a surgical intervention carried out by an open laparoscopic approach with a transhumbelical Hasson trocar (without a Verres needle to obtain the pneumoperitoneum) and four additional trocars (two of 10 mm and two of 5 mm). Once the lesion was clearly identified, the overlying serosa was cut by a harmonic scalpel (Harmonic Ace; Ethicon Endo-Surgery, Cincinnati, OH, USA). Through a cautious dissection performed under endoscopic control in order to keep the cyst intact, to prevent perforation of the gastric wall, the mass was totally exposed and then completely resected using a linear endoscopic stapler (Echelon™ 60; Ethicon Endo-Surgery). The surgical procedure was completed by performing a Dor fundoplication. The patient had an uneventful postoperative recovery and was discharged on the seventh postoperative day.
Gastric duplication cyst lined by pseudostratified columnar ciliated epithelium
Gensler et al., 1966 
Takahara et al., 1996 
Kim et al., 2000 
Hedayati et al., 2003 
Melo et al., 2005 
Rubio et al., 2005 
Song et al., 2005 
Lee et al., 2006 
Cunningham et al., 2006 
Fever, abdominal pain
Wakabayashi et al.,2007 
Hall et al., 2007 
Theodosopoulos et al.,2007 
(1) Fundus PW;
(2) Gastrosplenic lig.
Sato et al., 2008 
Murakami et al., 2008 
Middle body, LC
Shibahara et al., 2009 
Mardi et al., 2010 
Left lumbar pain
Jiang et al., 2010 
Jiang et al. 2011 
Khoury et al. 2011 
Middle body LC
Despite advances in imaging, cysts that contain solid secretions can often be misclassified as soft tissue masses. A rate of computed tomography misdiagnosis ranging from 43 to 70% of cases has been reported [9, 10]. Magnetic resonance imaging does not seem to significantly improve diagnostic accuracy . Therefore, in the majority of the reported cases, a definite diagnosis was made only during surgical resection or by pathological examination on surgical specimens [11–14]. EUS is currently the best available method for the diagnosis of the subepithelial lesions of the gastrointestinal tract. This technique has also been proved to be superior to computed tomography scan in distinguishing cystic from solid masses , but the diagnostic accuracy of EUS is affected by the variation of intracystic contents. The use of contrast-enhanced EUS may also be very useful in the differential diagnosis of digestive diseases [15, 16]. However, we did not find in the literature any paper discussing the role of contrast-enhanced EUS in the diagnostic evaluation of GDCs.
On the basis of EUS morphologic findings alone, a GDC may be misdiagnosed as a GIST, which is the most common gastric subepithelial lesion, as in the case reported by Jiang and colleagues . In the present case, EUS findings also suggested a diagnosis of GIST. Since the surgical treatment of GISTs involving the upper part of the gastric wall may require an extended gastric resection, we performed EUS-guided FNAC in order to confirm the diagnosis. While inserting the needle we realized that the presumed GIST was a cystic lesion, and the cytological sampling led to a diagnosis of GDC with respiratory epithelium. There are only few case reports concerning EUS-guided FNAC of gastrointestinal duplication cysts [1, 10, 18–20], but since respiratory-type cells or detached ciliary tufts are visualized in cytologic preparations, a definite diagnosis can be easily made . Pitfalls can occur if the cyst is lined by gastric epithelium only, as in the case described by Wang and colleagues . EUS-guided FNAC led to a cytological misdiagnosis of gastric mucinous neoplasm.
Owing to the report of gastric cancer arising in gastric duplication [2, 21–23], surgery is nowadays considered the standard treatment for these lesions . The possibility of a malignant transformation is related to the presence of a gastric-type lining epithelium. Ponder and Collins therefore suggested that surgery is not necessary if respiratory epithelium is recognized on EUS-guided FNAC . Nevertheless, it has been shown in the FDCs of the stomach that pseudostratified columnar ciliated epithelium may be associated with gastric epithelium , which could be missed by cytological sampling. For this reason, it may be that a complete surgical excision of the cyst should be recommended; also, in selected cases, some authors consider its observation as a reasonable option. A surgical procedure that does not require a gastric resection can be easily undertaken by a laparoscopic approach, as performed in this case.
In summary, GDCs – particularly those with respiratory epithelium – represent a rare disease, often misdiagnosed as GISTs, which are more common. Nevertheless, these lesions should be considered in the differential diagnosis of subepithelial gastric masses, especially if located in the upper part of the gastric wall. Using this technique we will not take any chance on treating a FDC of the stomach through unnecessary extended gastric resection.
Written informed consent was obtained from the patient for publication of this case report and any accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal.
- Wang B, Hunter WJ, Bin-Sagheer S, Bewtra C: Rare potential pitfall in endoscopic ultrasound-guided fine needle aspiration biopsy in gastric duplication cyst: a case report. Acta Cytol 2009, 53:219–222.PubMedView Article
- Coit DG, Mies C: Adenocarcinoma arising within a gastric duplication cyst. J Surg Oncol 1992, 50:274–277.PubMedView Article
- Cunningham SC, Hansel DE, Fishman EK, Cameron JL: Foregut duplication cyst of the stomach. J Gastrointest Surg 2006, 10:620–621.PubMedView Article
- Ribet ME, Copin MC, Gosselin B: Bronchogenic cysts of the mediastinum. J Thorac Cardiovasc Surg 1995, 109:1003–1010.PubMedView Article
- Murayama S, Murakami J, Watanabe H, Sakai S, Hinaga S, Soeda H, Nakata H, Masuda K: Signal intensity characteristics of mediastinal cystic masses onT1-weighted MRI. J Comput Assist Tomogr 1995, 19:188–191.PubMedView Article
- Fazel A, Moezardalan K, Varadarajulu S, Drananov P, Eloubeidi MA: The utility and the safety of EUS-guided FNA in the evaluation of duplication cysts. Gastrointest Endosc 2005, 62:575–580.PubMedView Article
- Khoury T, Rivera L: Foregut duplication cysts: a report of two cases with emphasis on embryogenesis. World J Gastroenterol 2011, 17:130–134.PubMedView Article
- Bondestam S, Salo JA, Salonen OL, Lamminen AE: Imaging of congenital esophageal cysts in adults. Gastrointest Radiol 1990, 15:279–281.PubMedView Article
- Takahara T, Torigoe T, Haga H, Yoshida H, Takeshima S, Sano S, Ishii Y, Furuya T, Nakamura E, Ishikawa M: Gastric duplication cyst: evaluation by endoscopic ultrasonography and magnetic resonance imaging. J Gastroenterol 1996, 31:420–424.PubMedView Article
- Eloubeidi MA, Cohn M, Cerfolio DR, Chhleng DC, Jhala N, Jhala D, Eltoum JA: Endoscopic ultrasound-guided fine-needle aspiration in the diagnosis of foregut duplication cysts: the value of demonstrating detached ciliary tufts in cyst fluid cancer. Cancer Cytopathol 2004, 102:253–258.
- Melo N, Pitman MB, Rattner DW: Bronchogenic cyst of the gastric fundus presenting as a gastrointestinal stromal tumor. J Laparoendosc Adv Surg Tech 2005, 15:163–165.View Article
- Song SY, Noh JH, Lee SJ, Son HJ: Bronchogenic cyst of the stomach masquerading as benign stromal tumor. Pathol Int 2005, 55:87–91.PubMedView Article
- Lee S, Park D, Park J, Kim H, Park S, Kim S, Oh M: Endoscopic mucosal resection of a gastric bronchogenic cyst that was mimicking a solid tumor. Endoscopy 2006,38(Suppl. 2):E12-E13.PubMedView Article
- Mardi K, Kaushal V, Gupta S: Foregut duplication cysts of stomach masquerading as leiomyoma. Indian J Pathol Microbiol 2010, 53:160–161.PubMedView Article
- Hirooka Y, Itoh A, Kawashima H, Ohno E, Itoh Y, Nakamura Y, Hiramatsu T, Sugimoto H, Sumi H, Hayashi D, Ohmiya N, Miyahara R, Nakamura M, Funasaka K, Ishigami M, Katano Y, Goto H: Contrast-enhanced endoscopic ultrasonography in digestive diseases. J Gastroenterol 2012.
- Kitano M, Sakamoto H, Kudo M: Endoscopic ultrasound: contrast enhancement. Gastrointest Endosc Clin N Am 2012, 22:349–358.PubMedView Article
- Jiang W, Zhang B, Fu Y, Wang J, Gao S, Zhang S, Wu Y: Gastric duplication cyst lined by pseudostratified columnar ciliated epithelium: a case report and literature review. J Zhejiang Univ-Sci B (Biomed Biotechnol) 2011, 12:28–31.View Article
- Hall DA, Pu RT, Pang Y: Diagnosis of foregut and tailgut cysts by endosonographically guided fine-needle aspiration. Diagn Cytopathol 2007, 35:43–46.PubMedView Article
- Sato M, Irisawa A, Bhutani MS, Schnadig V, Takagi T, Shibukawa G, Wakatsuki T, Imamura H, Takahashi Y, Sato A, Hikichi T, Obara K, Hashimoto Y, Watanabe K, Ohira H: Gastric bronchogenic cyst diagnosed by endosonographically guided fine needle aspiration biopsy. J Clin Ultrasound 2008, 36:237–239.PubMedView Article
- Ponder TB, Collins BT: Fine needle aspiration biopsy of gastric duplication cyst with endoscopic ultrasound guidance. Acta Cytol 2003, 47:571–574.PubMedView Article
- Shibahara H, Arai T, Yokoi S, Hayakawa S: Bronchogenic cyst of the stomach involved with gastric adenocarcinoma. Clin J Gastroenterol 2009, 2:80–84.View Article
- Iwanaga T, Koyama H, Takahashi Y, Taniguchi H, Wada A: Diffuse submucosal cysts and carcinoma of the stomach. Cancer 1975, 36:606–614.PubMedView Article
- Kuraoka K, Nakayama H, Kagawa T, Ichikawa T, Yasui W: Adenocarcinoma arising from a gastric duplication cyst with invasion to the stomach: a case report with literature review. J Clin Pathol 2004, 57:428–431.PubMedView Article
- Murakami S, Isozaki H, Shou T, Sakai K, Toyota H: Foregut duplication cyst of the stomach with pseudostratified columnar ciliated epithelium. Pathol Int 2008, 58:187–190.PubMedView Article
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