Objective To explore the diagnostic value of conventional ultrasound combined with contrast-enhancedultrasound in adrenal tumor.Methods Sixty patients with adrenal tumor diagnosed by surgical pathology were selected.Conventional ultrasound and contrast-enhanced ultrasound were performed before surgery to analyze their ultrasoundcharacteristics. The results of conventional ultrasound and contrast-enhanced ultrasound were compared with the results ofsurgical pathology

and the receiver operating characteristic（ROC）curve was drawn to analyze the diagnostic value ofconventional ultrasound

contrast-enhanced ultrasound and their combination in adrenal tumor.Results Of the 60 adrenaltumor patients

53 cases were diagnosed by conventional ultrasound.The average diameter of 30 cases of adenoma was（23.14±4.61）mm

with homogeneous and fine point echoes inside

smooth and neat boundary and a complete envelope. The averagediameter of 15 cases of pheochromocytoma was（56.74±4.51）mm

the interior showed uniform low-echo and the boundary showedhigh clear echo.The average diameter of 8 cases of medullary lipoma was（38.42±4.62）mm

with round homogeneous echo

regular morphology and clear boundary. Of the 60 patients with adrenal tumor

57 were diagnosed by contrast-enhancedultrasound.Thirty-two cases of adenoma showed uniform enhancement around the lesion and scattered contrast agent inside.19 cases of pheochromocytoma were filled with contrast agent

and most of them showed obvious enhancement

which were rich inblood supply.Six cases of myeloid lipoma showed inhomogeneous enhancement with high center and low peripheral echo.Thesensitivity and specificity of conventional ultrasound combined with contrast-enhanced ultrasound in the diagnosis of adrenaltumor were 91.25% and 90.33% respectively

area under ROC curve was 0.931

which were higher than those of conventionalultrasound and contrast-enhanced ultrasound alone（all P<0.05）.Conclusion Both conventional ultrasound and contrast-enhanced ultrasound can accurately diagnose adrenal tumors

and the combined application of them can improve the diagnosticaccuracy

which is worthy of clinical application.