Interestingly, we observed that IFN-α and IFN-γ showed consistent upregulation in serum samples from PCC patients (Fig. 9A, P < 0.01), which was also confirmed by IF staining in GC biopsy specimen (Fig. 9B, PCC-specific IFIT1 + TANs are surrounded by large amounts of INF-γ). Here, IFIT1 is linked to adrenal gland pheochromocytoma.