True about Ghons focus:
Inhaled tubercule bacilli implanted in the distal air spaces of the lower pa of upper lobe or upper pa of lower lobe ,close to the pleura lead to formarion of ghons focus. Primary complex of tuberculosis consists of 3 components. Pulmonary compound Draining lymphnodes Caseating hilar lymphnode Caseous holar lymphadenopathy is associated with ghon complex and not ghon focus.(ref Robbins 8th/370,9/e p374)
Left apical parenchymal lesion
Right apical parenchymal lesion
Subpleural caseous lesion in right upper lobe
Subpleural caseous lesion just above or below interlobar fissure.
Respiratory system