FN1 and neoplasm: L19-TNF (Fibromun, Philogen S.p.A., Siena, Italy) is a fully-human immunomodulatory product consisting of a non-covalent homotrimeric immunocytokine featuring human TNF fused to the L19 antibody (specific to EDB of fibronectin, a marker of tumor neovasculature) [12].