Pulmonary Sequestration

The term sequestration comes from the Latin “Sequestrare”, which means to separate
Though rare, it is the second most common lung malformation with an incidence of 1.1%–1.8% of children
Almost all cases occur sporadically.
Pulmonary Sequestration is the presence of a discrete mass of lung tissue
without normal connection to the airway system.
Blood supply to the sequestered area arises Not from the pulmonary arteries but from the aorta or its branches.
Pulmonary sequestration is two types
Intalobar sequestration and Extralobar Sequestration.
intralobar sequestrations
Occur within the lung substance
Extralobar sequestrations
Occur external to the lung