TSPAN1 and adrenal gland pheochromocytoma: Although no substantial difference was found in the TSPAN1 expression level for DFS in PCC patients (p > 0.05) (Figure S1J), univariate and multivariate COX analysis outcomes indicated that TSPAN1 could serve as an independent prognostic factor for PCC patients (Table S2, Figure S2 and 8).