CT ring enhancing lesions

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  1. Primary brain tumor (glioblastoma)
  2. Metastasis (especially post chemotherapy)
  3. Abscess – ring is smooth and regular and usually thinner on the medial side
    1. In HIV most common are toxoplasma, crytococcus, and TB (Toxoplasmosis is most common)
  4. Multiple sclerosis
  5. Resolving hematoma (10-21 days)
  6. Tuberculoma
  7. Radiation necrosis
  8. Postoperative change
  9. Aneurysm
  10. Remember MR. PATHAM: Mets, Radiation necrosis, Primary brain tumor, Abscess, Tuberculoma, Hematoma, Aneurysm, MS
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