The infected sites become surrounded by macrophages, which form granuloma, giving the typical appearance of miliary tuberculosis.Alternatively, the bacteria may attack the cells lining the alveoli and enter the lymph node(s). The bacteria then drain into a systemic vein and eventually reach the right side of the heart. From the right side of the heart, the bacteria may seed—or re-seed as the case may be—the lungs, causing the eponymous "miliary" appearance. Diagnosis
Testing for miliary tuberculosis is conducted in a similar manner as for other forms of tuberculosis, although a number of tests must be conducted on a patient to confirm diagnosis. Tests include chest x-ray, sputum culture, bronchoscopy, open lung biopsy, head CT/MRI, blood cultures, fundoscopy, and electrocardiography. The tuberculosis (TB) blood test, also called an Interferon Gamma Release Assay or IGRA, is a way to diagnose latent TB. A variety of neurological complications have been noted in miliary tuberculosis patients—tuberculous meningitis and cerebral tuberculomas being the most frequent. However, a majority of patients improve following antituberculous treatment. Rarely lymphangitic spread of lung cancer could mimic miliary pattern of tuberculosis on regular chest X-ray. The tuberculin skin test, commonly used for detection of other forms of tuberculosis, is not useful in the detection of miliary tuberculosis. The tuberculin skin test fails due to the high numbers of false negatives.
Autoimmune encephalitis is a type of encephalitis that can result from a number of autoimmune diseases including:

Rasmussen encephalitis
Systemic lupus erythematosus
Behçets disease
Hashimotos encephalopathy
Autoimmune limbic encephalitis
Sydenhams chorea


== References ==