Bihilar lymphadenopathy

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Bihilar lymphadenopathy is a radiographic term that describes the enlargement of mediastinal lymph nodes. It is easily and most commonly identified by a chest x-ray. The causes can divide into the four commonest:

Tuberculosis
Sarcoidosis
Lymphoma

Other malignancies

Less common causes include:

Churg-Strauss syndrome
Human Immunodeficiency Virus
Extrinsic allergic alveolitis
Pneumoconiosis

References