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Gastric lymphangioma: a case report and review of literature

Abstract

Background

Gastric lymphangioma is one of the highly rare benign tumors characterized by multilocular or unilocular lymphatic spaces. Herein, we report a case of lymphangioma in the gastric antrum.

Case presentation

A 77-year-old male patient who had been experiencing epigastric discomfort for a year was presented to our hospital. A gastric subepithelial lesion was diagnosed by upper endoscopy and was entirely excised via diatal subtotal gastrectomy. Endoscopic ultrasonography revealed an echoless homogenous echo pattern in the third wall layer. A lymphangioma was diagnosed by pathologic investigation of the resected specimen. The PubMed, Embase and Web of Science databases were reviewed for literature in English while using the keywords of “gastric lymphangioma” or “lymphangioma of stomach” or “gastric lymphatic cyst” or “lymphatic cyst of stomach” and the results were discussed.

Conclusion

Gastric lymphangioma is a rarely occurring submucosal tumor that should be considered when diagnosing subepithelial lesions in the stomach.

Peer Review reports

Background

Literature reports lymphangioma as a benign microcystic lymphovascular lesion located mostly in the axilla, groin, and neck and is characterised by dilated lymphatic channels [1]. The occurrence of lymphangioma in the stomach is not very common. This case reports a patient presented with epigastric discomfort. A broad-based, elevated subepithelial gastric lesion was diagnosed during a subsequent upper endoscopy. Endoscopic ultrasonography (EUS) revealed an echoless homogenous echo pattern in the third wall layer (submucosa) with well-defined inner septations. The evidence of lymphangioma was shown by the pathologic examination of the resected lesion. In the current case report, we evaluated the clinical symptoms, EUS signs, white-light endoscopic appearances, histopathologic features, and treatment course of this benign tumor, followed by a review of the relevant literature.

Case presentation

A 77-year-old man complained of epigastric discomfort for almost one year. He had an esophagogastroduodenoscopy in our hospital in September 2019 and a gastric subepithelial lesion (SEL) on the posterior wall of the stomach antrum was diagnosed. The lesion was sessile, broad-based and elevated in size, measuring 3.0 cm in diameter during white-light endoscopy. The surface of the overlying mucosa was red–orange normal stomach mucosa with no erosion or ulcer (Fig. 1a). Further endoscopic assessment of the gastric lesion with EUS revealed an homogeneous echoless mass with a high echogenic separation inside (Fig. 1b). Moreover, there were no signs of blood flow (Fig. 1c). The lesion was mostly in the submucosal area, and it didn't impact the underlying gastric muscularis propria. Abdominal contrast-enhanced computed tomography scan revealed a low density nodular mass located in the gastric antrum, without apparent enhancement (Fig. 1d). Because of the conjunction of gastric body adenocarcinoma (Fig. 2), this submucosal tumor was evaluated clinically as a benign lesion that was entirely excised by diatal subtotal gastrectomy.

Fig. 1
figure 1

Diagnosis of gastric antrum lymphangioma. a The surface of the overlying mucosa was normal. b EUS revealed an homogeneous echoless mass with a high echogenic separation inside. c No signs of blood flow. d Abdominal contrast-enhanced CT scan revealed a low density nodular mass without apparent enhancement. e Histopathological examination showed thin-walled, dilated lymphatic channels separated by fine fibrous stroma (hematoxylin‑eosin staining; magnification, × 40). f High power histopathological view showed flat endothelial cells lined the lymphatic canals (hematoxylin‑eosin staining; magnification, × 100)

Fig. 2
figure 2

Diagnosis of gastric body carcinoma. a White-light endoscopy showed a slightly elevated (IIa) and depressed (IIc) lesion. b Magnifying endoscopy with blue laser imaging (ME-BLI) showed demarcation line (DL), absent microsurface pattern (AMSP), and irregular microvascular pattern (IMVP). c EUS revealed a hypoechoic lesion infiltrating into the third layer. d Histopathological examination showed carcinoma cells infiltrating into the submucosa (hematoxylin‑eosin staining; magnification, × 40)

The size of the resected lesion was 2.5 × 2.0 × 1.0 cm. The lesion was serially sectioned after routine formalin fixation to reveal a soft, whitish-grey, and slightly spongy cut surface. There was no solid nodule or tumor found. Further, there was no evidence of bleeding or necrosis. When observed under a microscope, the lesion mainly affected the submucosa layer and was composed of thin-walled, dilated lymphatic channels separated by fine fibrous stroma (Fig. 1e). Flat endothelial cells lined the lymphatic canals (Fig. 1f), and the overlaying epithelium or tumor had no malignancy or dysplasia. All microscopy images was captured by light microscope (Olympus BX53, Japan) with an attached Olympus cellSens Standard software.

The patient's stay in the hospital after surgery went smoothly. He was well during his 6-month follow-up and had no problems. All procedures performed in this study involving human participants were in accordance with the 1964 Helsinki Declaration and subsequent relevant ethics. Written informed consent was obtained from the patient.

Discussion and conclusions

Lymphangioma is a rare benign soft tissue tumor that affects the gastrointestinal tract in adults. About 1% of lymphangiomas originate in the gastrointestinal tract, where the colon is the most common site for lymphangiomas [2]. Only 24 cases of gastric lymphangioma published in English were found in the PubMed, Embase and Web of Science databases. The major advantage for discussion of this case is that we provided the fairly typical and detailed case images, including white-light endoscopic appearances, EUS signs, contrast-enhanced CT images and histopathological images. These images could help clinicans to get a better understanding of this rare benign tumor.

The characteristics of the 24 cases are shown in Table 1. The median age is 51.5 years, and 57.1% (12/21) is male. In most cases, gastric lymphangioma is a single tumor. Although tumors can range in size from 1.2 to 44 cm, most are less than 5 cm in diameter (65.0%,13/20), with median diameter of 3.8 cm. The tumor is most commonly found in the gastric antrum (36.3%,8/22). There is only one case that is located in the gastric cardia [3].

Table 1 Cases of Gastric Lymphangioma in the English Literature

The clinical manifestations of gastric lymphangioma are generally nonspecific. Epigastric discomfort, as shown in our case, is the most common complaints (40.9%, 9/22). They may be asymptomatic and can be identified incidentally (18.2%, 4/22). Sometimes, they may have various chief complaints, even could cause gastrointestinal hemorrhage [4], tumor rupture [5], gastric outlet obstruction [6] or gastric perforation [7], depending upon the size and location of a tumor. There are only two cases that gastric lymphangioma coexists with mucosal gastric cancer. In one case [8], the mucosal adenocarcinoma is located immediately above the lymphangioma.While in our case, the gastric antrum lymphangioma and the gastric body adenocarcinoma are located apart.

Under white light endoscopy, the tumour is red–orange typical gastric mucosa with no ulcer or erosion; it is pliable upon compression with biopsy forceps. A large tumor may be translucent and lustrous. The depth and size of a lesion could be assessed with EUS. Under EUS, a cystic homogeneous echoless mass with hyperechoic inner septations in the third layer is the hallmark appearance of a gastric lymphangioma. The use of EUS examination can assist distinguish lymphangioma from gastric GIST (gastrointestinal stromal tumor), the most common gastric SEL. However, in the two cases composed of multiple small lymphatic spaces [3, 9], EUS could reveal a homogeneous medium echogenic mass.

Microscopically, gastric lymphangioma is characterized by localized proliferation of thin-walled, dilated lymphatic channels of diverse diameters observed in the current case. In the overlying squamous epithelium, there is no dysplasia. In most cases, determining the accurate diagnosis based on histological findings is not difficult. A negative immunoreactivity for FVIII, positive immunostaining pattern in lymphatic endothelial cells for D2-40 could help establish the diagnosis of lymphangioma in cases where it has to be distinguished from hemangioma.

Depending on the size of the tumor, different treatment options for gastric lymphangioma may be used. A large symptomatic tumor can be surgically removed. Endoscopic therapy was previously not used to resect gastric lymphangiomas. Kazuoki Hizawa et al. [9] firstly reported two cases of gastric lymphangioma resected by endoscopic mucosal resection (EMR) in 1996. Further more, the large tumor up to 4 cm in size has been reported to be totally and successfully resected by endoscopic submucosal dissection (ESD) without severe adverse consequences in 2016 [3], thanks to advances in endoscopic procedures and the accumulation of surgical expertise by endoscopists. Endoscopic resection has been the treatment of choice for gastric lymphangioma, offering benefits over surgery in terms of minimal injury, elevated efficacy and safety, and improved quality of life following resection.

To summarize, gastric lymphangioma is a rare submucosal tumor that should be considered when diagnosing gastric SEL. The use of EUS for preoperative diagnosis and evaluation of tumor size and depth is critical.

Availability of data and materials

All the data regarding the case are available within the manuscript.

Abbreviations

EUS:

Endoscopic ultrasonography

SEL:

Subepithelial lesion

EMR:

Endoscopic mucosal resection

ESD:

Endoscopic submucosal dissection

ME-BLI:

Magnifying endoscopy with blue laser imaging

AMSP:

Absent microsurface pattern

IMVP:

Irregular microvascular pattern

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GBW and SYL designed the research. KHB, YJD and CJ collected the data and did the analysis. KHB, YJD and CJ prepared the manuscript draft. GBW and SYL provided research support and revised the manuscript. All authors read and approved the final manuscript.

Corresponding authors

Correspondence to Shiyong Lin or Guobao Wang.

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All procedures performed in this study involving human participants were in accordance with the 1964 Helsinki Declaration and subsequent relevant ethics. Written informed consent was obtained from the patient.

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Written informed consent was obtained from the patient for publication of this Case Report and any accompanying images.

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Bai, K., Dai, Y., Jiang, C. et al. Gastric lymphangioma: a case report and review of literature. BMC Gastroenterol 22, 407 (2022). https://doi.org/10.1186/s12876-022-02431-6

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