BTNL9 and neoplasm: Gene expression profile of BTNs, including BTN1A1, BTN2A1, BTN2A2, BTN2A3P, BTN3A1, BTN3A2, BTN3A3, BTNL2, BTNL3, BTNL8, BTNL9, BTNL10, and SKINTL was evaluated in normal and tumor lung tissues (Fig. 2A).