Endoscopic ultrasonography diagnosis of gastric glomus tumors

Figure 1 Endoscopic view of a well-circumscribed elevated lesion with normal overlying mucosa at the stomach antrum (arrow). A: Endoscopic ultrasound (EUS) characteristics of glomus tumors; B: Tumor originates from the fourth EUS layer (muscularis propria) and shows slight hypoechogenicity and a characteristic marginal halo around the tumor.

Figure 2 Computed tomography features of glomus tumors. Contrast-enhanced computed tomography image obtained during the plain scan, arterial phase, portal phase; homogeneous strong enhancement is seen in the gastric antrum lesion (arrow).

Figure 3 Photomicrograph of the tumor cells. A: Clusters of uniform, round cells around dilated blood vessels, cytoplasm was transparent or reddish, and the cells had no atypia or mitotic appearance; B: Positive smooth muscle actin staining of tumor cells, which shows a brown cytoplasmic stain; C: Positive h-caldesmon staining of tumor cells, which shows a brown cytoplasmic stain; D: Positive vimentin staining of tumor cells, which shows a brown cytoplasmic stain. Hematoxylin-eosin; original magnification: 200 ×.