Indications】 1. Local diagnosis of pheochromocytoma. 2. To determine the site and extent of metastases of malignant pheochromocytoma. 3.Detection of residual lesions or recurrent lesions after pheochromocytoma surgery. 4.Adjuvant diagnosis of adrenal medullary hyperplasia. 5. CT or ultrasound imaging of suspicious adrenal lesions that require further information on the nature and functional status of the lesion. Gao Yongju, Department of Nuclear Medicine, Henan Provincial People’s Hospital 6. Follow-up observation after 131I-MIBG treatment for malignant pheochromocytoma. 7. Adjuvant diagnosis of neuroblastoma, paraganglioma and their metastatic lesions. 8. Differential diagnosis of unexplained hypertension. Contraindications】Pregnant and lactating women.