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03 November 2014 : Original article  

Ultrasound Imaging in the Diagnosis of Benign and Suspicious Adrenal Lesions

Jin FanA, Jie TangA, Jiabin FangB, Qiuyang LiC, Enhui HeD, Jia LiE, Yanqiu WangF

DOI: 10.12659/MSM.890800

Med Sci Monit 2014; 20:2132-2141

Abstract

BACKGROUND: The purpose of this study was to define the ultrasound imaging characteristics of adrenal tumors and to assess the performance of ultrasound in differentiating benign ‘leave-alone’ lesions from suspicious lesions.

MATERIAL AND METHODS: We enrolled 882 patients in this study. The nature of each lesion was determined by histopathology. Ultrasound finding of each lesion was compared with its corresponding histopathologic result. The final study group consisted of 911 adrenal masses in 882 patients. All images were reviewed by 2 experienced investigators in a double blind manner.

RESULTS: There were 553 adenomas identified in the study, which constituted 60.70% of the lesions. There were 161 pheochromocytomas (17.67%), 49 myelolipomas (5.38%), 39 cysts (4.28%), 37 metastasis (4.06%), 35 ganglioneuromas (3.84%), 22 lymphomas (2.41%), and 15 cortical carcinomas (1.65%). The sensitivity, specificity, and accuracy of ultrasound-based diagnosis were 89%, 99%, and 93.9%, respectively. A positive predictive value of 90.9% and a negative predictive value of 94.2% were obtained in this study.

CONCLUSIONS: This large-sample study showed that ultrasound was a reliable method in differentiating benign ‘leave-alone’ lesions from suspicious lesions.

Keywords: Adrenal Gland Neoplasms - ultrasonography, Diagnosis, Differential, Sensitivity and Specificity

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750