Advances in endoscopic ultrasound imaging of colorectal diseases

Figure 1 Endoscopic ultrasonography image in a T3 sigmoid cancer showing hypoechoic infiltration beyond the muscularis propria (arrows).

Figure 2 Contrast-enhanced endoscopic ultrasonography in a T3 tumour of the recto-sigmoid junction. A: Before contrast arrival (left side contrast harmonic imaging mode, right side B mode); B: Maximal enhancement of the tumour 15 s after contrast injection with hyperenhanced areas alternating with avascular (necrotic) areas.

Figure 3 Endoscopic ultrasonography elastography image of a rectal adenocarcinoma with a predominantly blue pattern indicating a low strain mass (left side real-time sono-elastography mode, right side B mode).

Figure 4 Three-dimensional endoscopic ultrasonography in a T3 rectal cancer with peritumoral lymph nodes (red arrows).

Figure 5 Contrast-enhanced endoscopic ultrasonography in a large rectal gastrointestinal stromal tumour. A: Before contrast uptake; B: Heterogeneous enhancement after contrast injection.