Discussion of Miliary tuberculosis
- Background: Miliary tuberculosis (TB) is the widespread dissemination of Mycobacterium tuberculosis from hematogenous spread.
- Classic miliary TB is defined as milletlike (mean 2 mm, range 1-5 mm) seeding of TB bacilli in the lung, as evidenced on chest radiograph.
- This pattern is seen in 1-3% of all TB cases.
- Miliary TB may occur in an individual organ (very rare, <5%), in several organs, or throughout the whole body (>90%), including the brain.
- The infection is characterized by a large amount of TB bacilli, although it easily may be missed and is fatal if untreated.
- Up to 25% of patients with miliary TB may have meningeal involvement.
- On autopsy, multiple TB lesions are detected throughout the body in organs such as the lungs, liver, spleen, brain, and others.
- Untreated, the mortality rate is assumed to be close to 100%.
- With early and appropriate treatment, the mortality rate is reduced to less than 10%.
 Imaging Findings for Miliary tuberculosis
- As mentioned above, classic miliary TB is defined as milletlike (mean 2 mm, range 1-5 mm) seeding of TB bacilli
 See Also
 External Links
 References for Miliary tuberculosis
- E-medicine miliary tuberculosis article