Abstract #4116

Diffusion-Weighted MR Imaging (DWI) in Adrenal Lesions: Clinical Applications

Yi Wang¹, Robert J. Mccarthy², Laura Merrick³, Paul Nikolaidis³, Vahid Yaghmai³, Riad Salem³, Frank H. Miller³

¹Radiology , Northwestern University , Chicago , IL, USA; ²Anesthesia, Northwestern University, USA; ³Radiology, Northwestern University, Chicago, IL, USA

Diffusion-weighted MR has recently been used in body imaging for distinguishing benign from malignant lesions; however, imaging findings in the adrenal have not been well described. We reviewed our experience to determine if there was a correlation between ADCs and adrenal lesions. 158 lesions were evaluated by DWI, including 118 adenomas, 9 myelolipomas, 9 cysts, 9 metastases, 4 adrenal cortical carcinomas, 4 hemorrhage, 3 pheochromocytomas, 1 angiolipoma, and 1 neuroblastoma. The mean ADC value of benign lesions was 1.690.59 and malignant was 1.860.92 (p>0.05) with no statistical difference (p>0.05). Diffusion-weighted MR could not characterize benign and malignant lesions due to significant overlap.