MUC4 and pancreatic neoplasm: MUC4 is highly expressed in human pancreatic tumours and pancreatic tumour cell lines; however, its expression is undetectable in the normal pancreas or chronic pancreatitis (Balague et al, 1994; Hollingsworth et al, 1994; Choudhury et al, 2000a; Andrianifahanana et al, 2001).