Extramural venous invasion in gastric cancer: 9.4T magnetic resonance imaging assessment and circular RNA functional analysis

Figure 5 Extramural venous invasion in a gastric cancer orthotopic mouse model visualized parallel to the plane of magnetic resonance imaging axial imaging. A: T2-weighted fat-suppressed images showing gastric cancer, characterized by a thickened gastric wall with homogeneous signal intensity (within the red circle). Extramural venous invasion appears as a tubular structure with slightly high signal (orange arrow), connected to the tumor and adjacent vessels (white arrow); B: Hematoxylin & eosin staining of the tumor (200 ×); C: Smooth muscle actin staining (200 ×); D: CD34 staining (200 ×). ¹Extramural venous invasion; T: Tumor; red dashed line: Tumor boundary.