IGF1 and neoplasm: Signal intensity IGF1‐IONP/IONPnontargeted in PDAC ≈ 0.6 (24 hr p.i.) tumor weight ratio IGF1‐IONP‐Dox/IONP‐Dox ≈ 0.6 tumor weight ratio IGF1‐IONP‐Dox/Dox ≈ 0.5