Many things: Inflammation of the lymph nodes (infection, cancer etc) and lead to enlargement of the nodes and their appearance on xray see your doctor.
Answered 9/9/2013
4.9k views
Infection/tumor: Lymph nodes in mediastinum of chest can enlarge with reaction to infections such as TB , histoplasmosis, and coccidiodomycosis. Sometimes bacterial infections in lungs demonstrate reactive lymph nodes. Lymph nodes can also enlarge with tumors such as lymphoma.
Answered 3/10/2018
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