嗜铬细胞瘤(Pheochromocytoma)是一种比较少见的疾病。多发生于肾上腺髓质(占80～90％),右侧较多(约占60％),偶亦发生于腹膜后或后纵膈的付交感神经节,故有付节瘤之称。病因不明,多为良性(90～98％),少数病例发展成恶性(2～10％)。可发生于任何年龄,以20～50岁最多。由于嗜铬细胞能分泌大 Pheochromocytoma is a relatively rare disease. Occurred in the adrenal medulla (80 ~ 90%), the right side (about 60%), even occurred in the retroperitoneal or posterior mediastinum to pay sympathetic ganglion, so it is known to pay tumors. The etiology is unknown, mostly benign (90 to 98%), and a few cases develop into malignant (2 to 10%). Can occur at any age, up to 20 to 50 years old. As chromaffin cells can secrete large