"Primary pulmonary tuberculosis is seen in patients not previously exposed to Mycobacterium tuberculosis."
"Infection is the result of droplet inhalation from a close contact which can cause focal pneumonia in a distal airway, typically in the lower lobe. Lymphadenopathy is common. The incubation period can be up to 6 weeks and the infection often remains subclinical, provokes an effective immune response and heals. Occasionally immunity is inadequate and progressive primary TB develops with the potential for miliary spread."
"progressive primary TB with cavitation"
Expected headings
"Complications"
"Nucleic acid amplification test and polymerase chain reaction confirm infection and determine rifampicin sensitivity. If this is not available, culture, IGRA or tuberculin test conversion can confirm infection."
"involvement of the pleura, pericardium or chest wall (empyema necessitans)"
"In approximately two-thirds of cases, the parenchymal focus resolves without sequelae at conventional radiography; however, this resolution can take up to 2 years. In the remaining cases, a radiologic scar persists that can calcify in up to 15% of cases, an entity that is known as a Ghon focus. Other calcified foci can also be seen, and persistent mass-like opacities called tuberculomas are seen in ~10% of cases 1."