Discussion
Diagnosis With Brief Discussion
- Diagnosis
- Bronchogenic cyst
- Radiologic Findings
- Fig 1. Chest PA shows a mass in the left posterior mediastinum.
Fig 2-3. Pre and postcontrast CT images show a 2-cm sized ovoid nodular lesion (mean attenuation: 37HU on precontrast CT, 50HU on postcontrast CT) in the left posterior mediastinum (laterally abutting the descending thoracic aorta).
Mediastinum, posterior, excision; Benign cyst, consistent with bronchogenic cyst
- Brief Review
- • • Known as foregut malformations; congenital anomalies caused by abnormal budding of the tracheobronchial tree.
• Discovered at any age, usually < 35years.
• A stalk or pedicle commonly attaches the cyst to a mediastinal structure. May be associated with other congenital anomalies of lung development, such as sequestration, lobar emphysema, and diaphragmatic hernia
• Imaging findings: Most commonly occur in the subcarina and right paratracheal regions. Usually manifest as smooth, well-marginated mediastinal mass on radiographs and CT. Typically homogeneous and approximately half are of water attenuation and half are of soft tissue attenuation due to intra-cystic hemorrhage or proteinaceous debris.
• Those of soft tissue attenuation may still be characterized as cystic if layering milk of calcium is present or shows homogeneous enhancement with no central enhancement and a thin wall.
- References
- 1. Bronchogenic Cyst: Imaging Features with Clinical and Histopathologic Correlation, H. Page McAdams et el, Radiology 2000; 217:441–446
- Keywords
- Lung, Developmental,