Brain abscess differential diagnosis: Difference between revisions

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Revision as of 20:19, 4 December 2012

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Some studies suggest that indium scans can help differentiate abscess from CA, and thallium SPECT scans can distinguish CNS toxoplasmosis from lymphoma.
The big differential is metastatic tumor: abscesses are often located in watershed regions, and tumors often enhance diffusely with contrast.
Despite these differences, the true Dx is sometimes not made until biopsy.

@@ Line 4: / Line 4: @@
 == Differential Diagnosis==
-:*Some studies suggest that indium scans can help differentiate abscess from CA, and [[thallium]] [[SPECT]] scans can distinguish [[CNS]] toxo from [[lymphoma]].
+:*Some studies suggest that indium scans can help differentiate abscess from CA, and [[thallium]] [[SPECT]] scans can distinguish [[CNS]] toxoplasmosis from [[lymphoma]].
-:* A [[CT scan]] with contrast will show a ring-enhancing mass that surrounds an area of hypodensity ([[necrosis]] or [[edema]]).
 :* The big differential is [[metastatic tumor]]: abscesses are often located in watershed regions, and [[tumor]]s often enhance diffusely with contrast.
 :* Despite these differences, the true Dx is sometimes not made until [[biopsy]].
-:*[[MRI]] is generally thought to be the imaging modality of choice and can more accurately stage the abscess and gauge the response to therapy.
-::* T1 images are similar to [[CT]], with a central hypodense signal and surrounding ring-enhancement.
-::* T2 images reveal a central hyperintense area surrounded by a well-defined hypointense capsule with surrounding [[edema]].
 ==References==