This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
The scan with highest sensitivity to detect adrenal metastasis due to bronchogenic carcinoma is: 
Select and explain. 
A. Contrast Enhanced CT abdomen with Adrenal protocol, B. PET scan, C. MRI scan, D. Radionuclide scan
B: PET scan
Answer: B: PET scan 
Explanation: Scans to differentiate adrenal adenoma from adrenal metastasis are: CECT - Chemical shift MRI FDG-PET PETscan has almost 100 % sensitivity for detecting adrenal metastasis, so a negative study excludes the possibility of adrenal mets. But adenomas can give false positive test. Ref: Fundamentals of Diagnostic Radiology, Edition - 4, Page - 427.