MSCT dual phase enhanced scanning in the differentiation of adrenalnon-functional pheochromocytoma from non-functional adenoma / 实用放射学杂志

ABSTRACT

Objective To analyze CT features of adrenal non-functional pheochromocytoma and non-functional adenoma and to provide reference for the diagnosis and differential diagnosis.Methods 17 cases of adrenal non-functional pheochromocytoma and 31 cases of non-functional adenoma confirmed by pathology were analyzed retrospectively.The imaging findings of two groups of cases were statistically analyzed, including size, shape, density, enhanced degree, visible tumor blood vessels, necrosis and cystoid variation and so on.Results The average diameter of the pheochromocytoma was (52.2±20.2) mm, and the average diameter of the adenoma was (27.8±17.6) mm, the difference was statistically significant (P<0.05).The average CT value of pheochromocytoma was higher than that of adenoma in plain, arterial and venous phases(all P<0.05).Of the 17 cases of pheochromocytoma, 14 cases (82.4%) can be seen tumor blood vessels in the arterial phase, 12 cases (70.6%) can be seen necrosis and cystoid variation, the margins of the tumors were no circular or arc-like enhancement;of the 31 cases of adenoma, 3 cases (9.7%) can be seen tumor blood vessels in the arterial phase, 2 cases (6.5%) can be seen necrosis and cystoid variation,10 cases (32.3%) can be seen circular or arc-like enhancement;all the differences were statistically significant (all P<0.05).Conclusion Adrenal non-functional pheochromocytoma and non-functional adenoma have characteristic imaging findings, dual phase enhanced scanning of MSCT is helpful for clinical diagnosis and treatment, one of the distinguishing points is to find tumor blood vessels in arterial phase.