The characters of computed tomography and magnetic resonance imaging in adrenal oncoctyoma patients / 中华泌尿外科杂志

ABSTRACT

Objective To summerize computed tomography (CT) and magnetic resonance imaging (MRI) appearances of the adrenal oncoctyoma(AOC),and to improve the diagnostic accuracy.Methods The 11 cases imaging materials of AOC confirmed by pathology from March 2006 to August 2017 were analyzed retrospectively.There were 3 males and 8 females,aged from 24 to 65 years old(mean 46.8 years).There were 11 cases with CT unenhanced scan in which 9 cases performed enhancing scan,8 cases underwent unenhanced and enhanced MRI scan.Results Of 11 cases (13 lesions),10 cases were singular,1 was unilaterally multiple(3 lesions).5 cases were located in the right side,6 in the left side.10 lesions presented oval,3 were round.The diameters of all lesions ranged from 1.4 to 9.9 cm,with a mean of 3.9 cm.All lesions were shown well-defined soft-tissue density on plain CT scan,69.2％ (9/13) of whom were homogeneous,30.8％ were heterogenous.The CT value ranged from 32.6 to 48.6 HU,with a mean of 37.9 HU.In 9 cases,5 masses were markedly enhanced,2 were slightly enhanced and 2 were moderately enhanced,and all of them depicted prolongedly enhanced on triple-phase scan.The masses of 8 cases appeared isointensity or slightly hypointensity on T1WI,hyperintesity on fat-suppressed T2WI.The signal did not change on opposed-phase imaging.The lesions demonstrated heterogeneously prolonged enhancement to some degree on enhanced TI WI images.There was no peritumoral adjacent invasion,enlarged lymph nodes and metastasis.Conclusions AOC usually presents soft-tissue density on unenhanced CT,no changing on MRI opposed-phase images.The tumors are characterized by markedly heterogeneously prolonged enhanced on enhanced CT and MRI.