Table 3 Criteria for clinical response evaluation [20–22]
Endoscopy | Endoscopic ultrasound | Others | |||
|---|---|---|---|---|---|
Responder | Major reduction of tumor size (>75 %) with significant flattening of the tumor | and | More than 50 % reduction of wall thickness (at the largest tumor diameter) | – | – |
Nonresponder | Visible residual tumor | and/or | Less than 50 % reduction of wall thickness (at the largest tumor diameter) | and/or | Metastatic lesions |