Detectable levels of Ck 19 (Ck 19 ≥ 1%) were found in 37,5% (96/256) of the cases, high levels of Ck 19 expression (Ck 19 > 50%) were found in 4,2% (11/256) of the investigated tumour specimens (Table 3). This evidence concerns the gene KRT19 and neoplasm.