STIM1 and renal cell carcinoma: In this view, UCB-ECFCs selectively express TRPC3, which is absent in all the other ECFC types [27]; RCC-ECFCs up-regulate Stim1, Orai1, TRPC1, while PMF-ECFCs present higher levels of Stim1, Orai1–3, TRPC1/TRPC4.