GPC1 and neoplasm: FI signal intensity GPC1‐GEM‐NP/GEM‐NP in PDAC ≈ 3.5 (24 hr p.i.) MRI signal intensity GPC1‐GEM‐NP/GEM‐NP in PDAC ≈ 2.5 (24 hr p.i.) tumor weight ratio GPC1‐GEM‐NP/GEM‐NP ≈ 0.25 (after 14 days) tumor weight ratio GPC1‐GEM‐NP/GEM ≈ 0.6 (after 14 days)