HTRA3 and hepatocellular carcinoma: In contrast, it should be emphasized that the expression of only DPYSL4, MMP3, HTRA3, PDX1, C21orf29, and ATHL1 proteins was ever observed in the cytoplasm/membrane by IHC staining analysis among HCC patients, of which the expression of DPYSL4, MMP3, and ATHL1 proteins was clearly detected in all involved samples.