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Question
68 yo man presents with new-onset seizures; his CT is shown below. What is your differential diagnosis?
Answer
Cerebral Ring-Enhancing Lesions
Neoplasm
- Primary brain tumor
- Primary CNS lymphoma
- Metastatic disease
Infectious
- Pyogenic abscess
- Tuberculoma
- Syphilis
- Neurocysticercosis
- Toxoplasmosis
- Nocardiosis
- Cryptococcosis
- Aspergillosis
Neurologic
- Multiple sclerosis (lesions within the white matter)
- Sacroidosis
- Vasculitis
- Aneurysm
- Resolving hematoma
- Cerebral infarct
- Postoperative change
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Iphone: http://itunes.apple.com/us/app/one-minute-ultrasound/id512301845?mt=8&ls=1
Garg, R., Sinha, M. Multiple ring-enhancing lesions of the brain. J Postgrad Med. 2010 Oct-Dec; 56(4):307-16
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