CT halo sign

The halo sign in chest imaging is a feature seen on lung window settings, ground glass opacity surrounding a pulmonary nodule or mass and represents hemorrhage. It is typically seen in angioinvasive aspergillosis.

Pathology

Histopathologically, it represents a focus of pulmonary infarction surrounded by alveolar hemorrhage.

Diagnostic considerations

Other entities that may give a halo sign include:

Infectious disease
Neoplasia
Non-neoplastic, non-infectious, inflammatory diseases

See also

Siehe auch:
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