Abstract: Object To highlight the diagnose and treatment of stationary paraganglioma in retroperitoneum . Methods 10 cases of stationary medullary chromaffinoma of retroperitoneum proven pathologically from 1997 to 2007 were reviewed and sutdied . Hypertension were not observed in all patients , who were admitted to hospital through routine phisical examination . Endocrine secretion examinations , B-US , CT, MRI , 131ＩMIBG ,and octreotide were used to dianose the diease.Among all 10 patients , 4 cases took α-receptor blocker for 2-4 weeks preoperatively.3 were operated laparoscopically , 7 were operated with lumber incision .Results Hypertension and urinary catecholamine was usually normal or elevated lightly in stationary medullary chromaffinoma of retroperitoneum .131and octreotide have high sensitivity and accuracy in diagosing medullary chromaffinoma . 4 were near renal hilum , 6 was in para-aorta.　They were from 3cm to 15cm in size . The results of pathology were paraganglioma in 7 and malignant paraganglioma in 3 . Tumor markers were positive ，such as cgA ，syn， NSE and s-100.There was 1 case metastasis 1 years later .Conclusions Once the correct diagnosis is acquired , surgical treatment should be carry out on the basis of correct drug preparation . Intimate follow-up is necessary and important .