PMC3075157_01
a Endoscopy of the glomus tumor, showing a spherical, submucosal solid tumor, located in the pyloric antrum with b endosonographically poorly reflective, inhomogeneous pattern and echo-free areas.
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F1
Upper endoscopy and endosonography were performed, revealing a spherical, submucosal, solid tumor approximately 50 mm in diameter located in the pyloric antrum (fig. 1a). An endosonographic picture with a poorly reflective, non-homogeneous pattern and echo-free areas was compatible with a 35 x 30 mm GIST (fig. 1b).
Immunohistochemistry; a negative CD 117-Ab reaction; b positive reaction on vimentin/actin staining (magnification 200x).
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F2
Histological section of the surgical specimen revealed a rare benign glomus tumor (positive reaction on markers specific for glomus tumor (vimentin/actin), fig. 2a; no reaction with CD-117 antibodies was seen, fig. 2b).