GRWD1 and pheochromocytoma: As displayed in Figure S7, the expression level of GRWD1 was positively correlated with TMB in ACC (P = 0.00086), LGG (P = 1.39e − 11), UCS (P = 0.031), SARC (0.00018), and READ (P = 0.024) tissues, while it was negatively correlated with TMB in pheochromocytoma and paraganglioma (PCPG; P = 0.0077) and THCA (P = 7.08e − 06) tissues.