BACKGROUND We herein report a rare case of an ectopic bronchogenic cyst of the gastric cardia. The initial diagnosis was a gastrointestinal stromal tumor (GIST); however, postoperative pathologic examination confirmed that it was a bronchogenic cyst. CASE PRESENTATION A 62-year-old woman visited our hospital for abdominal pain. The diagnosis prior to surgery was a GIST. Computed tomography imaging showed that the mass was located in the gastric cardia on the side of the lesser curvature. During the surgical exploration, it was noted that the tactility of the mass was not consistent with a GIST. Thus, we decided to perform local resection of the mass and part of the gastric wall without wedge resection. The pathological examination revealed a bronchogenic cyst. CONCLUSIONS This case suggests that a bronchogenic cyst should be considered as a differential diagnosis of a GIST. It is also a unusual but necessary situation should be considered when explaining the etiology of a bronchogenic cyst.

中文翻译：

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胃贲门异位支气管囊肿术前被认为是胃肠道间质瘤：病例报告。

背景我们在此报告一例罕见的贲门异位支气管囊肿病例。初步诊断为胃肠道间质瘤（GIST）；但术后病理检查证实为支气管囊肿。病例介绍 一名 62 岁女性因腹痛到我院就诊。手术前诊断为胃肠道间质瘤。计算机断层扫描显示肿块位于贲门小弯侧。在手术探查过程中，注意到肿块的触感与胃肠道间质瘤不一致。因此，我们决定对肿块和部分胃壁进行局部切除，而不进行楔形切除。病理检查发现支气管囊肿。结论 该病例表明支气管囊肿应被视为 GIST 的鉴别诊断。在解释支气管囊肿的病因时，这也是一种不常见但必要的情况。