The halo sign
نویسندگان
چکیده
1. Universidade Federal Fluminense, Niterói (RJ) Brasil. 2. Universidade Federal do Rio de Janeiro, Rio de Janeiro (RJ) Brasil. 3. Santa Casa de Misericórdia de Porto Alegre, Porto Alegre (RS) Brasil. 4. Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre (RS) Brasil. 5. Faculdade de Medicina de Petrópolis, Petrópolis (RJ) Brasil. A 49-year-old male smoker (with a smoking history of 90 pack-years) presented with vague complaints of dyspnea. Laboratory test results were normal. Serology for HIV was negative. A CT scan of the chest showed a nodule with the halo sign in the left lower lobe (Figure 1). Fungal serology was negative.
منابع مشابه
"Reversed halo sign".
Appearance: The reversed halo sign (also known as the atoll sign, reverse halo sign, and the fairy ring sign) is defined by central ground-glass opacity with a surrounding halo or crescent of consolidation (Fig. 1). This should not be confused with the halo sign which refers to central consolidation with a surrounding halo or rim of ground-glass opacity. Furthermore, the reversed halo sign shou...
متن کاملReversed Halo Sign: Presents in Different Pulmonary Diseases
OBJECTIVE To observe the incidence of reversed halo sign in different pulmonary diseases and the pathological correspondence of reversed halo sign. METHODS Retrospectively studied the high resolution computer tomography scans of all the patients who were admitted in our department with abnormal pulmonary imaging, from 1st of January 2011 to 31st of December 2013, and all the cases with revers...
متن کاملThe diagnostic value of halo and reversed halo signs for invasive mold infections in compromised hosts.
The halo sign is a CT finding of ground-glass opacity surrounding a pulmonary nodule or mass. The reversed halo sign is a focal rounded area of ground-glass opacity surrounded by a crescent or complete ring of consolidation. In severely immunocompromised patients, these signs are highly suggestive of early infection by an angioinvasive fungus. The halo sign and reversed halo sign are most commo...
متن کاملAtoll sign or reversed halo sign? Which term should be used?
We read with great interest the article by Walsh and Robertson reporting a case of cryptogenic organising pneumonia. The authors included wonderful images of a CT pattern they called the ‘atoll sign’, which has been described by other authors as the ‘reversed halo sign’. Zompatori et al first used the term ‘atoll sign’ in 1999 to describe the imaging finding of a focal rounded area of ground-gl...
متن کاملReversed halo sign in pneumocystis pneumonia: a case report
BACKGROUND The reversed halo sign may sometimes be seen in patients with cryptogenic organizing pneumonia, but is rarely associated with other diseases. CASE PRESENTATION We present a case study of a 32-year-old male patient with acquired immunodeficiency syndrome, who had previously been treated with chemotherapy for non-Hodgkin's lymphoma. A chest X-ray showed bilateral patchy infiltrates. ...
متن کاملImaging findings in acute invasive pulmonary aspergillosis: clinical significance of the halo sign.
BACKGROUND Computed tomography (CT) of the chest may be used to identify the halo sign, a macronodule surrounded by a perimeter of ground-glass opacity, which is an early sign of invasive pulmonary aspergillosis (IPA). This study analyzed chest CT findings at presentation from a large series of patients with IPA, to assess the prevalence of these imaging findings and to evaluate the clinical ut...
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