Endoscopic ultrasound and magnetic resonance imaging for re-staging rectal cancer after radiotherapy

Figure 1 Rectal EUS. A: Before neoadjuvant chemoradiation treatment: evidence of perirectal fat tissue invasion, with fat speculation; B: After neoadjuvant chemoradiation treatment: reduction of tumor size and perirectal fat invasion.

Figure 2 Rectal RMI. A: Before neoadjuvant chemoradiation treatment: evidence of perirectal fat tissue invasion, with fat spiculation, and enlarged mesorectal lymph nodes; B: After neoadjuvant chemoradiation treatment: reduction of tumor size, perirectal fat invasion, enlarged lymph nodes; non-homogeneous mesorectal fat tissue.

Figure 3 Rectal EUS and elastosonography before neoadjuvant chemoradiation treatment. Elastography showing hard tissue inside the lesion.