Reactive mediastinal lymphadenopathy in bronchiectasis assessed by CT.

Mediastinal lymphadenopathy is commonly detected on CT. It is a non-specific finding, but because of its significance in the treatment in lung carcinoma it is important to know with which other disease states it is associated. We present a series of 42 patients in whom CT of the chest was used to confirm a clinical diagnosis of bronchiectasis. The size, number and distribution of mediastinal lymph nodes is documented. Lymph nodes were visible in 81% of patients. Nodes larger than 10 mm, the recognised maximum size for normal nodes in the U. K., were detected in 29%. In the absence of other recognised causes of lymphadenopathy in these patients, these findings confirm "reactive" mediastinal lymph node enlargement in bronchiectasis.