This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiac and Pericardiac Imaging, Subject name: Radiology
Which among the following is NOT a cause of calcification in anterior mediastinal mass? 
Select and explain. 
A. Lymphoma after radiotherapy, B. Aneurysm of ascending aorta, C. Germ cell tumor, D. Leiomyoma of esophagus
D: Leiomyoma of esophagus
Answer: D: Leiomyoma of esophagus 
Explanation: Ans: D Posterior mediastinum contents Mnemonic: DATES -- Descending aorta. Azygous vein and hemiazygos vein, Thoracic duct, Esophagus, Sympathetic trunk/ganglia.