Halo sign (chest)
Updates to Article Attributes
Body
was changed:
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 haemorrhage. It is typically seen in angioinvasive aspergillosis.
Pathology
Histopathologically, it represents a focus of pulmonary infarction surrounded by alveolar haemorrhage.
Diagnostic considerations
Other entities that may give a halo sign include:
Infectious disease
- fungi
- septic embolism
- mycobacterial
- rickettsia - rickettsia pneumonia
- Coxiella burnetii - Q fever pneumonia
- viral: herpes simplex virus, varicella-zoster virus (chickenpox), cytomegalovirus, myxovirus
Neoplasia
- primary tumours
-
adenocarcinoma of the lung, adenocarcinoma in situ or minimally invasive (formerly bronchioalveolar carcinoma) - has been described as the most commonly encountered with
HShalo sign in immunocompetent patients 5 - squamous cell carcinoma of the lung
- Kaposi sarcoma
- pulmonary lymphoma
-
adenocarcinoma of the lung, adenocarcinoma in situ or minimally invasive (formerly bronchioalveolar carcinoma) - has been described as the most commonly encountered with
-
lung metastases (especially - haemorrhagic pulmonary metastases):
- angiosarcoma
- choriocarcinoma
- osteosarcoma
- melanoma
- metastasis from gastrointestinal adenocarcinoma (<10%)
Non-neoplastic, non-infectious, inflammatory diseases
- pulmonary infarction
- granulomatosis with polyangiitis
- eosinophilic lung disease
- pulmonary endometriosis
- organising pneumonia
- hypersensitivity pneumonitis
- iatrogenic injury
- pulmonary pseudoaneurysm
See also
- halo sign (breast)
- halo sign (ultrasound)
- reversed halo sign (atoll sign)
-<a href="/articles/adenocarcinoma-of-the-lung">adenocarcinoma of the lung</a>, <a href="/articles/adenocarcinoma-in-situ-of-the-lung">adenocarcinoma in situ</a> or minimally invasive (formerly <a href="/articles/adenocarcinoma-in-situ-minimally-invasive-adenocarcinoma-and-invasive-adenocarcinoma-of-lung-1">bronchioalveolar carcinoma</a>) - has been described as the most commonly encountered with HS in immunocompetent patients <sup>5</sup>- +<a href="/articles/adenocarcinoma-of-the-lung">adenocarcinoma of the lung</a>, <a href="/articles/adenocarcinoma-in-situ-of-the-lung">adenocarcinoma in situ</a> or minimally invasive (formerly <a href="/articles/adenocarcinoma-in-situ-minimally-invasive-adenocarcinoma-and-invasive-adenocarcinoma-of-lung-1">bronchioalveolar carcinoma</a>) - has been described as the most commonly encountered with halo sign in immunocompetent patients <sup>5</sup>
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