- Etiology: Mycobacterium tuberculosis via hematogenous spread
- Imaging: basilar meningitis, parenchymal extension via Virchow Robin spaces, multiple small ring enhancing tuberculomas at gray-white junction (often in parietal lobe) via hematogenous spread
- Note: stages are 1) Cerebritis – non-specific edema + ill-defined enhancement, 2) Solid granulomatous – enhancing nodules + surrounding edema, 3) Central caseation – central T2 hypointensity with peripheral enhancement, 4) Involution – calcified lesions
- Clinical: 30% have concomitant manifestations of TB outside CNS
Pediatric Imaging 