What are the different stages of pulmonary tuberculosis?
Primary pulmonary tuberculosis is usually asymptomatic, the residua of which is the Ghon complex. Secondary, or reactivation, tuberculosis typically occurs years after the primary infection and most commonly involves the apex of the lungs. Here it typically causes caseation necrosis and cavitation. With healing there is fibrosis. Either of these types of tuberculosis may become progressive, that is, evolve into miliary tuberculosis or tuberculous bronchopneumonia.
