Atelectasis (Contraction/Cicatrization)

Atelectasis (Contraction/Cicatrization) is a condition affecting the lungs where part of the lung tissue becomes permanently shrunken or scarred. This happens because of fibrosis or scarring that pulls the lung tissue inward, preventing it from fully expanding. The main effect is a reduction in the lung's ability to take in air, which can cause shortness of breath and decreased oxygen delivery to the body. It often results from chronic lung diseases or injury that cause lung scarring. This condition can lead to persistent breathing difficulties and may increase the risk of lung infections. The affected lung area loses its normal elasticity and volume, impacting overall lung function.

Atelectasis (Contraction/Cicatrization) is a form of lung collapse characterized by irreversible volume loss due to fibrotic scarring of the lung parenchyma or pleura. It results from chronic inflammatory or fibrotic processes such as tuberculosis, radiation fibrosis, or interstitial lung diseases that cause contraction of lung tissue. This contraction prevents normal lung expansion during inspiration, leading to reduced lung compliance and impaired gas exchange. Unlike other types of atelectasis, contraction atelectasis is not reversible by removing airway obstruction. It is clinically significant because it contributes to chronic respiratory symptoms and can complicate underlying pulmonary diseases. Radiographically, it presents as volume loss with displacement of fissures and mediastinal structures toward the affected side.