CTICasesSarcoidosis
Imaging findings
Thin-section CT shows a large, dense focal consolidative lesion in the right lung apex composed of confluent tiny nodules surrounded by satellite nodules (CT galaxy sign) and nodular thickening along the fissures, associated with well-defined mediastinal and hilar lymphadenopathy.
Key takeaways
The CT galaxy sign represents a large nodular mass formed by coalescent granulomas surrounded by tiny satellite nodules, which is a highly characteristic presentation of pulmonary sarcoidosis. Thin sections are essential for demonstrating the nodular components.
AI-assisted summary — may contain errors. Verify against the source video. Learn more
More from this webinar
- Septic thrombophlebitisInfection
- Aortic dissectionVascular
- Infective endocarditisInfection
- Diaphragmatic herniaIatrogenic
- Esophageal leiomyomaNeoplastic
- Malpositioned port needleIatrogenic
- Flipped subcutaneous portIatrogenic
- Pulmonary alveolar proteinosisOther
See all cases from October 6, 2018 →