TNF and pheochromocytoma: After adrenalectomy, the levels of TNF α were lower in patients with malignant tumors (8.60 ± 4.35 pg/mL vs. 30.4 ± 13.28 pg/mL; p < 0.02), and in patients with Conn’s syndrome (8.07 ± 3.03 pg/mL vs. 16.22 ± 1.11 pg/mL; p < 0.02), non-functioning adenomas (4.77 ± 3.91 pg/mL vs. 11.0 ± 2,03 pg/mL; p < 0.01) and pheochromocytomas (1.95 ± 3.23 pg/mL vs. 9.14 ± 4.58 pg/mL; p < 0.01) than before surgery (Figure 2).