Diagnostic images of case 1 and case 3. (A) T1-weighted magnetic resonance imaging (MRI) of representative radiologic response to vaccination in case 1 who achieved complete response. (B) Positron Emission Tomography (PET) of case 1. Diffusely infiltrated lymph node metastases around the hepato-duodenal ligament by MRI (A, left side) as well as PET (B, left side) were confirmed their disappearance by MRI and PET analysis after 10 months of vaccination (A &B, right side). (C) Computed tomography in case 3 who achieved stable disease. The massive liver metastases were kept stably for 5 months.