Objective To investigate the imaging features of primary extramedullary plasmacytoma(EMP)of the kid-ney,so as to improve the diagnostic accuracy of this disease.Methods The imaging data of 8 patients with EMP con-firmed by pathology were analyzed retrospectively,and their characteristics were summarized.Results Among the 8 pa-tients,5 patients were located in the left kidney and 3 patients were located in the right kidney.All of them were single le-sions.The maximum diameter of the lesions was 24-106 mm,and the average diameter was 52 mm.Most of the tumors were located outside the renal cortex and grew around the kidney.All of them were lobulated.The density of 6 patients was uniform,and the density of 2 patients was uneven.Tumor boundary was clear in 8 cases.The kidneys of 7 cases showed compression changes.On enhanced scanning,the masses showed moderate to severe enhancement,and the enhancement was more uniform.The extent of enhancement of the masses was lower than that of the renal cortex.There were tortuous and thickened vascular shadows in and around the tumors.Conclusion The imaging features of EMP have certain charac-teristics.The density of the tumor is uniform and the boundary is clear.Most of the tumors are located outside the renal cortex and grow around the kidney.The kidney is located in the center of the tumor like a"sandwich biscuit".Most of the kidneys are compressed and deformed.The tumor shows moderate to severe enhancement on enhanced scanning,and the enhancement is uniform.The tortuous and thickened vascular shadows can be seen in and around the tumor.
NETL
NSTL
维普
万方数据
