Results The pheochromocytomas occurred most unilaterally (19/20), 16 cases were found in adrenal gland,4 cases were ectopic.

• 结果嗜铬细胞瘤多是单侧发病(19/20),发生于肾上腺者16例,异位者4例。肿块较大,边界清楚,多为类圆形或椭圆形(19例)。