Atelectasis

Atelectasis is the collapse or incomplete inflation of part or all of a lung, so that the affected air sacs cannot fill properly with air. It can be caused by a blocked airway, pressure on the lung from fluid or a mass, scarring that pulls the lung tissue inward, or loss of the substance (surfactant) that keeps air sacs open. It is a finding on imaging, not a disease in itself, and it ranges from a small area seen only on CT to collapse of an entire lobe.

Origin

The word comes from the Greek atelēs (incomplete) and ektasis (expansion or stretching). It was coined in the early 1800s by the German physician Eduard Jörg to describe lungs of stillborn infants that had never fully inflated, and was later extended to collapse of previously aerated lung.

Significance in Asbestos Context

Atelectasis frequently shows up on the chest CT scans and X-rays of people with asbestos exposure, and the pattern matters. A specific form called rounded atelectasis (also called Blesovsky syndrome or folded lung) is strongly associated with asbestos-related pleural disease: thickened pleura traps and folds a portion of lung, producing a rounded mass that can be mistaken for lung cancer. Distinguishing rounded atelectasis from a tumor often requires a dedicated CT review by a radiologist familiar with asbestos disease, and sometimes PET imaging or biopsy. Documenting atelectasis tied to pleural thickening can also serve as supporting evidence of an asbestos-related injury in a medical-legal claim.

Example Sentence

His CT scan showed rounded atelectasis next to an area of pleural thickening, which his pulmonologist explained was a benign change related to his prior asbestos exposure rather than a new cancer.

Related Terms

Rounded Atelectasis, Pleural Plaques, Pleural Thickening, Asbestosis, Pleural Effusion, Diffuse Pleural Thickening

Notes

• If a scan report mentions atelectasis, ask your doctor specifically whether it is rounded atelectasis and whether it is linked to pleural disease. This distinction matters for both diagnosis and any legal claim.
• Request that all chest CTs and X-rays (the actual images on disc, not just the reports) be preserved; a radiologist experienced in asbestos cases may need to re-read them.
• If atelectasis is being worked up to rule out lung cancer, ask whether PET-CT or short-interval follow-up imaging is appropriate before proceeding to biopsy.
• Keep a copy of any pulmonary function test results, since atelectasis from pleural disease can reduce lung volumes and contribute to measurable breathing impairment used in damages calculations.