Depending on the size of the studied HCCs, a significant difference in positive ratio of MUC1 was observed between S3 HCC group (tumour size 5.0–8.0 cm) (~46%) and both S1 (tumour size <2.0 cm) (~7.0%) and S2 groups (2.0–5.0 cm) (~9.0%). Here, MUC1 is linked to neoplasm.