FN1 and neoplasm: Fibronectin 1 is a glycoprotein involved in cell–matrix and cell–cell adhesion, cell migration and oncogene transformation (Gould et al, 1990), as well as in tumour invasion and metastasis (Yamada et al, 1985; Schwartzbauer, 1988; Humphries and Yasuda, 1988; Couchman et al, 1990).