Halo sign: Difference between revisions
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{{Infobox medical condition | |||
| name = Halo sign | |||
| image = [[File:CT_Halo_sign_around_a_right_lower_lobe_pulmonary_nodule.png|left|thumb|CT scan showing a halo sign around a right lower lobe pulmonary nodule]] | |||
| caption = CT scan showing a halo sign around a right lower lobe pulmonary nodule | |||
| synonyms = | |||
| specialty = [[Radiology]], [[Pulmonology]] | |||
| symptoms = | |||
| complications = | |||
| onset = | |||
| duration = | |||
| causes = [[Invasive pulmonary aspergillosis]], [[Hemorrhagic nodules]], [[Granulomatosis with polyangiitis]] | |||
| risks = | |||
| diagnosis = [[Computed tomography]] (CT scan) | |||
| differential = | |||
| prevention = | |||
| treatment = | |||
| medication = | |||
| prognosis = | |||
| frequency = | |||
}} | |||
'''Halo sign''' is a medical term used in radiology to describe the appearance of a lesion surrounded by a rim of ground glass opacity on a computed tomography (CT) scan. This sign is often associated with certain diseases, such as invasive pulmonary aspergillosis, and can be a crucial diagnostic feature. | '''Halo sign''' is a medical term used in radiology to describe the appearance of a lesion surrounded by a rim of ground glass opacity on a computed tomography (CT) scan. This sign is often associated with certain diseases, such as invasive pulmonary aspergillosis, and can be a crucial diagnostic feature. | ||
==Definition== | ==Definition== | ||
The '''Halo sign''' is defined as a focal area of ground glass opacity surrounding a nodule or mass on a CT scan. This appearance is due to hemorrhage or edema in the lung tissue surrounding the lesion. | The '''Halo sign''' is defined as a focal area of ground glass opacity surrounding a nodule or mass on a CT scan. This appearance is due to hemorrhage or edema in the lung tissue surrounding the lesion. | ||
==Clinical Significance== | ==Clinical Significance== | ||
The Halo sign is most commonly associated with [[Invasive Pulmonary Aspergillosis]], a serious fungal infection that can occur in immunocompromised patients. However, it can also be seen in other conditions such as [[Cryptococcosis]], [[Tuberculosis]], and certain types of [[Lung Cancer|lung cancer]]. | The Halo sign is most commonly associated with [[Invasive Pulmonary Aspergillosis]], a serious fungal infection that can occur in immunocompromised patients. However, it can also be seen in other conditions such as [[Cryptococcosis]], [[Tuberculosis]], and certain types of [[Lung Cancer|lung cancer]]. | ||
==Diagnosis== | ==Diagnosis== | ||
The diagnosis of conditions associated with the Halo sign is typically made based on a combination of clinical symptoms, laboratory tests, and imaging findings. The presence of the Halo sign on a CT scan can provide valuable information to guide further diagnostic testing and treatment. | The diagnosis of conditions associated with the Halo sign is typically made based on a combination of clinical symptoms, laboratory tests, and imaging findings. The presence of the Halo sign on a CT scan can provide valuable information to guide further diagnostic testing and treatment. | ||
==Treatment== | ==Treatment== | ||
The treatment for conditions associated with the Halo sign depends on the underlying cause. For example, Invasive Pulmonary Aspergillosis is typically treated with antifungal medications, while lung cancer may require surgery, radiation therapy, or chemotherapy. | The treatment for conditions associated with the Halo sign depends on the underlying cause. For example, Invasive Pulmonary Aspergillosis is typically treated with antifungal medications, while lung cancer may require surgery, radiation therapy, or chemotherapy. | ||
==See Also== | ==See Also== | ||
* [[Ground Glass Opacity]] | * [[Ground Glass Opacity]] | ||
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* [[Tuberculosis]] | * [[Tuberculosis]] | ||
* [[Lung Cancer]] | * [[Lung Cancer]] | ||
[[Category:Medical Terminology]] | [[Category:Medical Terminology]] | ||
[[Category:Radiology]] | [[Category:Radiology]] | ||
| Line 26: | Line 41: | ||
[[Category:Oncology]] | [[Category:Oncology]] | ||
[[Category:Infectious Diseases]] | [[Category:Infectious Diseases]] | ||
{{stub}} | {{stub}} | ||
Latest revision as of 04:26, 7 April 2025
Editor-In-Chief: Prab R Tumpati, MD
Obesity, Sleep & Internal medicine
Founder, WikiMD Wellnesspedia &
W8MD medical weight loss NYC and sleep center NYC
| Halo sign | |
|---|---|
 | |
| Synonyms | |
| Pronounce | N/A |
| Specialty | Radiology, Pulmonology |
| Symptoms | |
| Complications | |
| Onset | |
| Duration | |
| Types | N/A |
| Causes | Invasive pulmonary aspergillosis, Hemorrhagic nodules, Granulomatosis with polyangiitis |
| Risks | |
| Diagnosis | Computed tomography (CT scan) |
| Differential diagnosis | |
| Prevention | |
| Treatment | |
| Medication | |
| Prognosis | |
| Frequency | |
| Deaths | N/A |
Halo sign is a medical term used in radiology to describe the appearance of a lesion surrounded by a rim of ground glass opacity on a computed tomography (CT) scan. This sign is often associated with certain diseases, such as invasive pulmonary aspergillosis, and can be a crucial diagnostic feature.
Definition[edit]
The Halo sign is defined as a focal area of ground glass opacity surrounding a nodule or mass on a CT scan. This appearance is due to hemorrhage or edema in the lung tissue surrounding the lesion.
Clinical Significance[edit]
The Halo sign is most commonly associated with Invasive Pulmonary Aspergillosis, a serious fungal infection that can occur in immunocompromised patients. However, it can also be seen in other conditions such as Cryptococcosis, Tuberculosis, and certain types of lung cancer.
Diagnosis[edit]
The diagnosis of conditions associated with the Halo sign is typically made based on a combination of clinical symptoms, laboratory tests, and imaging findings. The presence of the Halo sign on a CT scan can provide valuable information to guide further diagnostic testing and treatment.
Treatment[edit]
The treatment for conditions associated with the Halo sign depends on the underlying cause. For example, Invasive Pulmonary Aspergillosis is typically treated with antifungal medications, while lung cancer may require surgery, radiation therapy, or chemotherapy.
