fetal pulmonary sequestration.

1.  Dr Arun Gupta
Director imaging
 Dr Rakhee gupta
Dr Vinayak Mittal
 Dr Ragini
ADVANCED USG
LOUNGE
Dr Ritesh Mahajan FETAL
 Dr Kiran
PULMONARY
SEQUESTRATION.

2. A pulmonary sequestration (also known as a Broncho-pulmonary
sequestration or cystic lung lesion), is a medical condition wherein a piece
of tissue that ultimately develops into lung tissue is not attached to the
pulmonary arterial blood supply, as is the case in normally developing
lung. As a result, this sequestered tissue is not connected to the
normal bronchial airway architecture, and as a result, fails to function in,
and contribute to respiration of the organism.
This condition is usually diagnosed in children and is generally thought
to be congenital in nature. More and more, these lesions are diagnosed in
utero by prenatal ultrasound .

3. BPS is estimated to comprise 0.15 to 6.4 percent of all congenital
pulmonary malformations making it an extremely rare disorder.
Sequestrations are classified anatomically :
Intra-lobar sequestration (ILS) in which the lesion
is located within a normal lobe and lacks its
own visceral pleura.
Extra-lobar sequestration (ELS) in which the mass
is located outside the normal lung and has its
own visceral pleura.
The blood supply of 75% of pulmonary sequestrations is derived from
the thoracic or abdominal aorta .
The remaining 25% of sequestrations receive their blood flow from
the subclavian , intercostals ,pulmonary ,pericardio-phrenic,
innominate, internal mammary ,celiac , splenic , renal arteries .

4. DEFINED WEDGE SHAPED
HYPERECHOIC REGION IS APPRECIATED IN LEFT LOWER
LOBE ( BASAL ASPECT ) OF THE FETAL LUNG .

5. MULTIPLANAR
IMAGE CORELATION
FOR FOCAL WEDGE
SHAPED
HYPERECHOIC AREA
IN THE BASAL
ASPECT OF THE
LEFT LOWER LOBE.

6. Prominent vessel emanating
from the abdominal aorta
( subphrenic region) and
reaching to the focal
echogenic area in the basal
aspect of the left lower lobe .

7. Power doppler also has e/o Branch of
ABDOMINAL AORTA
Supplying the hyperechoic focus in the basal aspect of the left lung ) .

8. DIAGNOSTIC
ULTRASOUND
FOURTH EDITION
Carol M. Rumack, MD, FACR
Stephanie R. Wilson, MD, FRCPC
J. William Charboneau, MD, FACR
Rochester, Minnesota