HIV AIDS MRI: Difference between revisions
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===Toxoplasmosis=== | ===Toxoplasmosis=== | ||
*Lesions may appear hyperintense or isointense depending on the type of infection. | *Lesions may appear hyperintense or isointense depending on the type of infection. | ||
*In necrotising encephalitis due to Toxoplasma, the | *In necrotising encephalitis due to Toxoplasma, the MRI findings will be hyperintense. | ||
*If the lesion is an abscess, the | *If the lesion is an abscess, the MRI will show isointense characteristics. | ||
* Most of the time the lesions are surrounded by edema | * Most of the time the lesions are surrounded by edema | ||
*If contrast is used, the | *If contrast is used, the MRI will show the characteristic ring enhancement lesions. | ||
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|[[File:MRI HIV Toxoplasmosis.jpg|thumb|300px| Image courtesy of Dr Frank Gaillard, [http://www.Radiopaedia.org Radiopedia]. (original file [http://radiopaedia.org/cases/cerebral-toxoplasmosis)] [http://radiopaedia.org/licence Creative Commons BY-SA-NC] | |||
|[[File:MRI HIV Toxoplasmosis 2.jpg|thumb|300px| Image courtesy of Dr Frank Gaillard, [http://www.Radiopaedia.org Radiopedia]. (original file [http://radiopaedia.org/cases/cerebral-toxoplasmosis)] [http://radiopaedia.org/licence Creative Commons BY-SA-NC] | |||
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==References== | ==References== | ||
Revision as of 16:40, 21 October 2014
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AIDS Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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HIV AIDS MRI On the Web |
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American Roentgen Ray Society Images of HIV AIDS MRI |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [3]; Associate Editors-in-Chief: Ujjwal Rastogi, MBBS; Ammu Susheela, M.D. [4]
Overview
Magnetic resonance imaging or MRI is used in great deal for the care of HIV-positive patients. MRI is the first-choice among neuroimaging modality in the workup for AIDS dementia complex. An MRI is more sensitive than a head CT in determining if a lesion is truly solitary.
MRI
Advantages of MRI over CT in AIDS diagnosis
- Much more sensitive than CT scan in determining if a lesion is truly solitary.
- Greater sensitivity for white matter disease.
- Greater sensitivity for lesions in the posterior fossa.[1]
- Helps in identifying a peripheral lesion which is more accessible for histological sampling, in case a biopsy is being considered.[2]
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Toxoplasmosis
- Lesions may appear hyperintense or isointense depending on the type of infection.
- In necrotising encephalitis due to Toxoplasma, the MRI findings will be hyperintense.
- If the lesion is an abscess, the MRI will show isointense characteristics.
- Most of the time the lesions are surrounded by edema
- If contrast is used, the MRI will show the characteristic ring enhancement lesions.
| [[File:MRI HIV Toxoplasmosis.jpg|thumb|300px| Image courtesy of Dr Frank Gaillard, Radiopedia. (original file [5] Creative Commons BY-SA-NC | [[File:MRI HIV Toxoplasmosis 2.jpg|thumb|300px| Image courtesy of Dr Frank Gaillard, Radiopedia. (original file [6] Creative Commons BY-SA-NC |
References
- ↑ Skiest DJ (2002). "Focal neurological disease in patients with acquired immunodeficiency syndrome". Clin. Infect. Dis. 34 (1): 103–15. doi:10.1086/324350. PMID 11731953. Retrieved 2012-02-12. Unknown parameter
|month=ignored (help) - ↑ Whiteman ML, Post MJ, Berger JR, Tate LG, Bell MD, Limonte LP (1993). "Progressive multifocal leukoencephalopathy in 47 HIV-seropositive patients: neuroimaging with clinical and pathologic correlation". Radiology. 187 (1): 233–40. PMID 8451420. Retrieved 2012-02-12. Unknown parameter
|month=ignored (help)