CTICasesSarcoidosis
Imaging findings
CT chest shows large, mass-like consolidations in multiple lobes. Each mass is surrounded by a halo of numerous tiny, well-defined satellite nodules, representing the classic sarcoid galaxy sign. Massively enlarged mediastinal lymph nodes are also present.
Key takeaways
The 'sarcoid galaxy sign' is a helpful radiographic sign of sarcoidosis. It represents a large coalescent nodule surrounded by a crowd of smaller satellite nodules. It represents active granulomatous disease and can mimic primary neoplasm or infectious pneumonia.
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