Pulmonary sequestration (intralobar)

Last revised by Ammar Haouimi on 5 Mar 2022

Intralobar pulmonary sequestration (ILS) is a subtype of pulmonary sequestration

Patients usually present before the third decade with recurrent infection.

It is the commoner type of pulmonary sequestration (four times commoner than extralobar sequestration), accounting for 75% of all sequestrations and is characterized by the sequestration surrounded by normal lung tissue without its own pleural covering.

There is increasing data to support the concept of sequestrations stemming from recurrent infections that produce aberrant arterial vessels arising from the aorta 6. Feeding vessels include branches from the thoracic aorta (75%), abdominal aorta, intercostal artery or multiple arteries. Venous drainage commonly occurs via the pulmonary venous system.

There is strong predilection towards the lower lobes (predominantly left lower lobe).

Surgical excision is the mainstay of treatment.

On imaging, possible differential considerations include:

ADVERTISEMENT: Supporters see fewer/no ads

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.