HIV - What can we learn from a MRI or CT scan?

on 29.12.09 with 0 comments

Various abnormalities are of course possible, but these can be roughly divided schematically into:
  • Ring-enhanced single lesion: abscess, with frequency toxoplasmosis > TB > cryptococcosis. The peripheral staining by the contrast medium shows the oedema zone around the abscess. On this basis a test therapy will often be started without having formal proof of toxoplasmosis. If there is no improvement within two weeks or if deterioration occurs, a stereotactic brain biopsy should be performed. In addition to these three etiologies, there can be other causes of an intracranial mass: herpes, Histoplasma, Nocardia, Candida, Kaposi, metastasis. In 10% of cases no specific cause is found.
  • Non-ring enhanced lesion: probably lymphoma > PML. In case of PML there is no mass effect.
  • Bilateral diffuse lesions: immune reconstitution syndrome if in the correct context.
  • Multiple ring lesions: toxoplasmosis >> tuberculosis.
  • HIV atrophy: broadened sulci and enlarged ventricles (DD internal hydrocephalus: flattened sulci and enlarged ventricles).
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Category: Brain , Conditions and Diseases , Health , HIV , Immune reconstitution inflammatory syndrome , Infectious disease , Medical Subject Notes , Progressive multifocal leukoencephalopathy , Tuberculosis



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