In intralobar sequestration represents what percentage of sequestration cases?

• A. 50%
• B. 25%
• C. 75%
• D. 10%

Answer: (C)

Intralobar sequestration is the more common form of pulmonary sequestration, representing about three-quarters of cases. This type lies within a normal lung lobe and shares the visceral pleura with it, which is why it is encountered far more often than the extralobar type, which has its own separate pleura and accounts for the remaining roughly 25%. So, the best answer reflects that intralobar sequestration makes up the majority of cases, about 75%.