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: Medicine
Most common cause of Mediastinitis is: 
Select and explain. 
A. Tracheal rupture, B. Esophageal rupture, C. Drugs, D. Idiopathic
B: Esophageal rupture
Answer: B: Esophageal rupture 
Explanation: Answer is B (Esophageal rupture): Most cases of acute mediastinitis are due to esophageal perforation or occur after median sternotomy for cardiac surgery- Harrison Acute Mediastinitis Chronic Mediastinitis 1. 2. Esophageal rupture Q Median sternotomy for cardiac surgery 1. 2. 3. Tuberculosis / Histoplasmosis (most cases) Q Sarcoidosis, silicosis Q Other fungal diseases