CTICasesMigrating Pleural Mesothelial Cyst
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Imaging findings
Serial imaging including chest CT, MRI, and PET/CT demonstrates a benign, fluid-filled cystic structure in the pleural space that migrates between different locations on sequential examinations, including the anterior mediastinum, the oblique fissure, and the posterior pleural space. Surgical exploration confirms a benign mesothelial cyst attached to the pleural surface by a very thin, pedunculated stock.
Key takeaways
Mesothelial cysts of the pleural space are benign lesions that can occasionally be pedunculated, allowing them to freely migrate within the pleural cavity or fissures. This mobility can lead to diagnostic confusion, prompting unnecessary biopsies or concerns for malignancy if the cyst's changing position on serial scans is not recognized as a hallmark of a "wandering" or migrating pleural cyst.
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