J Korean Soc Radiol.  2015 Dec;73(6):389-392. 10.3348/jksr.2015.73.6.389.

A Rare Case of Cystic Subepithelial Tumor in the Stomach: Gastric Adenomyoma

• Lee H
• Jang YJ
• Heo J

• KMID: 2130944
• DOI: http://doi.org/10.3348/jksr.2015.73.6.389

Abstract

Gastric adenomyoma is a rare benign subepithelial tumor, characteristically composed of mucosal structures and a prominent smooth muscle stroma. Because of rarity and the nonspecific computed tomography (CT) features, it is difficult to diagnose gastric adenomyoma before operation. In our case, gastric adenomyoma showed a well-circumscribed cystic subepithelial mass with uneven wall thickness on a CT scan, similar to the findings of former reports. The radiologic differential diagnosis can be narrowed down to several diseases, including duplication cysts, gastritis cystica profunda, brunner's gland hyperplasia and solid tumors with cystic degeneration. Also, adenomyoma could be included in the differential diagnosis of gastric cystic subepithelial masses, especially in the distal part of the stomach.

MeSH Terms

Adenomyoma*
Diagnosis, Differential
Endoscopy
Gastritis
Hyperplasia
Muscle, Smooth
Stomach*
Tomography, X-Ray Computed

Figure

• 

  Fig. 1 An upper gastrointestinal endoscopic examination shows a round mass protruding in to the lumen in the anterior wall of the gastric antrum. Relatively normal overlying mucosa is observed, and the mass is smoothly compressible by an endoscopic forceps.

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  Fig. 2 Axial (A) and coronal (B) reformatted contrast-enhanced CT images show a well-circumscribed cystic mass (arrows), with uneven wall thickening, in the gastric antrum.

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  Fig. 3 A microscopy of the specimen shows epithelial elements (arrows) in the form of individual glandular structures supported by the hypertrophic smooth muscle fibers (*) of the stroma (hematoxylin & eosin stain, × 50).

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