What is the pathophysiology of right middle lobe syndrome (recurrent atelectasis)?

Updated: Oct 22, 2020
  • Author: Tarun Madappa, MD, MPH; Chief Editor: Nader Kamangar, MD, FACP, FCCP, FCCM  more...
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Right middle lobe syndrome (also known as Brock syndrome) refers to recurrent right middle lobe collapse secondary to airway disease, infection, or a combination of the two. The right middle lobe bronchus is long and thin, has the poorest drainage or clearance of all the lobes of the lung, which can result in retained mucus, and is more prone to extrinsic compression by the lymphatic system. Individuals with middle lobe syndrome are often asymptomatic, although some present with recurrent productive cough and history of right-sided pneumonias.

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