FCN1 and pheochromocytoma-paraganglioma: Through univariate Cox and log-rank test analyses, we discerned that FCN1 exhibited prognostic significance across a spectrum of cancers, excluding BRCA, KICH, KIRP, Pheochromocytoma and Paraganglioma (PCPG), Rectum adenocarcinoma (READ), Thyroid carcinoma (THCA), and UCEC (Supplementary Figure S10A).