RALGDS and hereditary clear cell renal cell carcinoma: Given that RalGDS dP10 was detectable exclusively in porcine kidney cell lines and not in other cell lines or healthy porcine tissues, and considering the spontaneously immortalized nature of LLC-PK1 cells (sharing characteristics with cancer cells), dP10 warrants investigation as a potential diagnostic biomarker for porcine renal cell carcinoma.