1994
Mediastinal lymphoma as a cause of tracheobronchial obstruction is uncommon , and a malignant tracheoesophageal fistula in the setting of mediastinal lymphoma is rare .
 Mediastinal lymphoma, tracheobronchial, malignant tracheoesophageal fistula, mediastinal lymphoma
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Mediastinal lymphoma, tracheobronchial, malignant tracheoesophageal fistula, mediastinal lymphoma