CTICasesEphemeral Chest Wall Synovial Cyst
▶ Watch on YouTube — age-restricted, cannot embed here
Imaging findings
Chest radiograph demonstrates a subtle extrapleural-appearing opacity in the right upper hemithorax. Follow-up CT confirms a well-defined extrapleural soft tissue nodule deep to the first rib. MRI shows a fluid-attenuated, water-like lesion on t1 and t2-weighted sequences that traces up to the costochondral junction of the first rib. The lesion markedly decreased in size and changed shape between exams.
Key takeaways
Synovial cysts of the chest wall are benign, fluid-filled lesions that arise from joints, such as the costovertebral, costotransverse, or costochondral junctions. They present as extrapleural masses on CT and MRI and are characterized by fluid signal on MRI. These cysts can be "ephemeral," changing shape or size dynamically due to fluid fluctuation or rupture.
AI-assisted summary — may contain errors. Verify against the source video. Learn more
More from this webinar
- Hypertrophic Cardiomyopathy with Chordal Systolic Anterior Motion (SAM)Congenital
- Anomalous Left Main Coronary Artery with Intramural CourseCongenital
- Congenitally Corrected Transposition of the Great Arteries (L-TGA)Congenital
- Light-Chain Deposition Disease (LCDD) in Sjogren's SyndromeMetabolic
- Solitary Fibrous Tumor of the PleuraNeoplastic
- Tracheal Bronchus supplying Azygos Lobe with Top Pulmonary Vein VariantCongenital
- Bilateral Congenital Anomalies: Left Sequestration with CPAM and Right Basilar Systemic ArterializationCongenital
- Central Bronchial Carcinoid mimicking Swyer-James-MacLeod SyndromeNeoplastic
See all cases from October 9, 2015 →