Cerebral toxoplasmosis, CT scan
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CT scan showing the characteristic "ring enhancement" seen in Toxoplasma encephalitis. Ring enhancement can also be seen in CNS abscess, cysticercosis, demyelination, HIV encephalitis, progressive multifocal leukoencephalopathy (PML), CNS lymphoma, and other conditions. Usually, however, the patient is treated for toxoplasmosis with this clinical picture. If treatment fails to improve the patient, a biopsy is then indicate