Related Experiment Videos
Mediastinal sarcoidosis presenting as ventilation-perfusion mismatch
L A Cohen1, W D Murphy, J S Kelling
1Department of Radiology, Timken Mercy Medical Center/Northeastern Ohio Universities College of Medicine, Canton.
Chest
|May 1, 1994
Summary
Sarcoidosis, a disease causing granulomas, can manifest unusually. This case highlights sarcoidosis presenting as a ventilation-perfusion mismatch on lung scans.
Area of Science:
- Pulmonology
- Immunology
- Pathology
Background:
- Sarcoidosis is an idiopathic multisystem disease characterized by noncaseating granulomas.
- The etiology of sarcoidosis remains unknown, posing diagnostic challenges.
Observation:
- A patient presented with symptoms suggestive of a pulmonary embolism.
- Initial diagnostic imaging revealed a significant ventilation-perfusion (V/Q) mismatch on a lung scan.
Findings:
- The V/Q mismatch was ultimately attributed to sarcoidosis, not pulmonary embolism.
- Histopathological examination confirmed noncaseating granulomas consistent with sarcoidosis.
Implications:
- This case underscores the diverse and sometimes atypical presentations of sarcoidosis.
- Recognizing sarcoidosis as a cause of V/Q mismatch can prevent misdiagnosis and guide appropriate management.
- Further research into sarcoidosis etiology and varied clinical manifestations is warranted.