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Disproportionate Mediastinal Shift From an Isolated Right Middle Lobe Collapse: A Case Report
Sarib Sultan1, Yasmin Obeidi1, Mohammad Mahdi1
1Department of Research, Sam Houston State University College of Osteopathic Medicine, Conroe, USA.
Cureus
|May 15, 2026
Summary
Even small lung segments like the right middle lobe (RML) can cause significant mediastinal shift when collapsed. This radiographic finding is important in patients with underlying airway issues or hyperinflation.
Area of Science:
- Pulmonology
- Radiology
- Thoracic Medicine
Background:
- Mediastinal displacement is a known sign of atelectasis, typically associated with larger lung segment collapse.
- Isolated right middle lobe (RML) collapse usually causes minimal mediastinal deviation due to its small lung volume contribution.
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Pneumothorax-I
A pneumothorax is a condition where air builds up in the space between the lung and the chest wall, causing the lung to collapse. This condition arises when air enters the space between the parietal and visceral pleura, disrupting the negative pressure essential for lung inflation. This can lead to a partial or complete collapse of the lung.
Pneumothorax can be even further classified as spontaneous, traumatic, and tension pneumothorax.
Pneumothorax can be even further classified as spontaneous, traumatic, and tension pneumothorax.
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Pneumothorax-II
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Clinical Manifestations:
Clinical Manifestations:
Flail Chest-II
Managing flail chest, a condition characterized by a segment of the chest wall moving independently from the rest of the thoracic cage, requires a comprehensive approach. It includes a thorough assessment of the patient's condition, a diagnostic evaluation to determine the extent of the injury, and the implementation of appropriate medical interventions tailored to the individual's needs.
Assessment:
1. Clinical Evaluation:
History:
Assessment:
1. Clinical Evaluation:
History:

