Endoscopic enucleation of gastric choristoma in a child

Introduction. In pediatric practice, one may encounter various volumetric formations of the stomach, both benign and malignant. The verification and localization of the neoplasma is the most difficult issue in everyday work. Most often, benign tumors are represented by a rounded submucosal formation, covered with an intact mucous membrane. The most common formations that can be found in a child are leiomyomas.

Objective is to present the first experience of endoscopic submucosal dissection and enucleation of the choristoma in a child.

Clinical observation. The girl was admitted for inpatient treatment with complaints of prolonged (2 years) abdominal syndrome and mass formation of the antrum of the stomach. According to CT data, a voluminous soft tissue formation 8 × 7 × 12 mm in size was revealed in the antrum of the stomach, which does not accumulate a contrast agent. When performing esophagogastroduodenoscopy and endosonography, a submucosal formation of the prepyloric stomach was visualized, with dimensions of 7 × 10 mm. The macroscopic picture of the tumor corresponded to gastric leiomyoma. However, given the clinical picture, it was impossible to exclude the chorous stomach. Thus, the diagnosis was formulated: volumetric formation of the stomach. Leiomyoma? Choristoma? In the course of further treatment, surgical treatment was performed, in the amount of submucosal enucleation of the formation. According to the morphological study, the remote formation corresponded to the ectopic pancreatic tissue.

Conclusion. Choristoma does not always have a “classic” appearance with retraction in the center, and the clinical picture is of great importance in the verification of neoplasma. Endoscopic submucosal removal of gastric choristoma is a minimally invasive and effective method of surgical treatment that can be used in children.

Contribution:
Lokhmatov M.M., Solodinina E.N., Dyakonova E.Yu. — the concept and design of the study;
Korolev G.A., Budkina T.N., Oldakovskiy V.I., Tupylenko A.V., Efremenkov A.M. — collection and processing of material, writing the text, editing the text.
Аll co-authors — аpproval of the final version of the article, responsibility for the integrity of all parts of the article. 

The study protocol was approved by the local ethics committee. The patients’ parents gave written voluntary informed consent to participate in the study.

Acknowledgment. The study had no sponsorship.

Conflict of interest. The authors declare no conflict of interest.

Received: August 19, 2022
Accepted: September 20, 2022
Published: October 31, 2022

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