Figure 8. Characteristic radiologic features of testicular adrenal rest tumors. Testicular adrenal rest tissue masses often surround the mediastinum testes (arrow) (A), and are bilateral, intratesticular, and hypoechoic (B). Testicular adrenal rest tissue masses are seen equally as well on ultrasonography and magnetic resonance imaging. Most of these masses are hypointense on T2-weighted images (C) and isointense on T1-weighted images, with diffuse enhancement post-contrast (D). Large testicular adrenal rest tissue (E) typically shrinks or disappears (F) with higher-dose glucocorticoid therapy.

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