Unresectable characteristics include:

1. >180-degree encasement of SMA, celiac axis, first jejunal branch of SMA for head lesions

2. >180-degree encasement of the SMA, celiac axis, or abutment of CA w/ aortic involvement for body/tail lesions

3. Unreconstructable SMV/PV occlusion, contact w/ most proximal draining jejunal branch of SMV

4. Aortic invasion/encasement