CTICasesMetastatic melanoma
Imaging findings
Chest CT shows multiple growing, solid pulmonary nodules surrounded by ground-glass halos (CT halo sign) representing hemorrhage, in a patient with recurrent metastatic melanoma.
Key takeaways
The CT halo sign represents ground-glass opacity surrounding a pulmonary nodule and typically indicates localized hemorrhage. While classically associated with angioinvasive aspergillosis, it can also be seen in hypervascular or hemorrhagic metastases, such as metastatic angiosarcoma, choriocarcinoma, or melanoma.
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