Objective:

To report a rare case of a bronchogenic cyst located in the gastric cardia and discuss the diagnostic challenges encountered during evaluation.

Approach:

Key Findings:

• The cyst was confirmed as a bronchogenic cyst through histopathological examination.
• Elevated tumor markers in cyst fluid should be interpreted cautiously and not solely indicative of malignancy.
• EUS played a crucial role in localizing and characterizing the cystic lesion.

Interpretation:

This case highlights the diagnostic challenges associated with gastric bronchogenic cysts and the importance of comprehensive evaluation, including imaging and cyst-fluid analysis.

Limitations:

• The study is based on a single case, limiting generalizability.
• The significance of cyst-fluid tumor markers in diagnosing malignancy remains uncertain.

Conclusion:

This case illustrates the need for careful interpretation of cyst-fluid tumor markers and the utility of EUS in managing subepithelial cystic lesions.

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