Obstetrical Ultrasound Cases - PowerPoint PPT Presentation


PPT – Obstetrical Ultrasound Cases PowerPoint presentation | free to view - id: fdae-MTFlY


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation

Obstetrical Ultrasound Cases


... doesn't depend on renal function- can be normal with BRA ... BRA usually sporadic. There are autosomal dominant forms: sono kidneys of close family members ... – PowerPoint PPT presentation

Number of Views:6933
Avg rating:5.0/5.0
Slides: 51
Provided by: rich1


Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: Obstetrical Ultrasound Cases

Obstetrical Ultrasound Cases
  • Douglas Richards, M.D.
  • Maternal Fetal Medicine
  • University of Florida

Richards Presentations on the Web
  • www.obgyn.ufl.edu
  • Click on ultrasound then
  • Hot Seats Podium 2009 or
  • Hot Seats Answers 2009
  • You must have Power Point installed on your
    computer to run

Case 1
  • Heart displaced to right of chest (top of
  • Stomach in posterior left chest
  • Left lobe of liver in anterior left chest
  • Bowel fills remainder of left chest
  • Right lung (behind heart) is small
  • Intrahepatic umbilical vein displaced to side of

Clinical correlation
  • Other common findings include polyhydramnios
    (50 of cases)
  • Most infants have severe respiratory
  • Many need ECMO
  • Predictors of poor outcome include
  • Small lung/ head ratio
  • Associated cardiac or other anomalies
  • Abnormal karyotype
  • Premature delivery

Left- sided diaphragmatic hernia
Case 2 a
Significant findings
  • Head lemon shaped (frontal narrowing)
  • Mild dilation of lateral ventricles
  • Cysterna magna obliterated. This is part of the
    Chiari type II malformation or banana sign

Clinical correlation
  • Intracranial findings usually more obvious than
    defect in spine
  • The lemon sign often not seen after about 24
  • In spite of ventriculomegaly, BPD usually less
    than average. Head enlarges after birth and
    repair of the spine defect- Shunting often needed

Intracranial findings with spina bifida
Case 2(b)
Significant findings
  • Transverse of spine shows widening of posterior
    echocenters arrows
  • Irregular neural elements between posterior
    echocenters. No skin cover, no MMC sac in this
  • Coronal of spine shows hole. Slight widening
    of rows of posterior echocenters
  • Spina bifida comprises half of neural tube
  • Ultrasound level of defect roughly correlates
    with neurologic outcome
  • Associated with an elevated maternal serum AFP
  • Incidence reduced by maternal folic acid
    ingestion before conception and early pregnancy
  • Usually delivered by cesarean before labor

Spine findings with spina bifida
Case 3
Significant findings
  • Large midline posterior fossa cyst communicates
    with 4th ventricle
  • Hypoplastic, widely-separated cerebellar
  • Absent cerebellar vermis
  • Dilated lateral ventricles (not shown)

Clinical correlation
  • Associated CNS malformations or genetic
    syndromes common
  • 35 mortality- depends on associated
    malformations or syndrome
  • 1/3 of survivors have IQ 80
  • A small cyst under the cerebellum may not be

Dandy Walker malformation
Case 4 (a)
Significant findings
  • Severely shortened long bones
  • Long bones malformed- may be bowed or have
    telephone receiver shape
  • Redundant soft tissues
  • Fingers short and sausage shaped

Clinical correlation
  • Most common lethal skeletal dysplasia
  • Uniformly fatal- respiratory insufficiency
  • Macrocrania may make vaginal delivery
  • Almost all cases sporadic

Abnormal limbs in thanatophoric dysplasia
Case 4 (b)
Significant findings
  • Very narrow chest
  • Chest/abdomen transition is bell- shaped
  • Small lungs

Clinical correlation
  • Skeletal dysplasias with small chest usually
  • Thanatophoric dysplasia
  • Short rib- polydactyly syndrome
  • Homozygous achondroplasia
  • Asphyxiating thoracic dysplasia (Jeune)
  • Campomelic dysplasia
  • Chondroectodermal dysplasia

Hypoplastic chest in thanatophoric dysplasia
Case 4 (c)
Significant findings
Coronal view of head, showing cloverleaf pattern
Clinical correlation
  • Caused by premature closure of cranial sutures
  • Seen in 15 of thanatophoric dysplasia
  • Other, sporadic syndromes include Crouzon,
    Pfeiffer, Carpenter, and Apert

Cloverleaf skull in thanatophoric
dysplasia kleeblattschadel
Case 5
Significant findings
  • Non- communicating cysts of varying sizes
    filling kidney

Clinical correlation
  • Sporadic occurrence
  • Usually unilateral. If so, good outcome
  • Kidney may be very large significant abdominal
    mass, or may be smaller than a normal kidney
  • May be segmental, but most often the entire
    kidney is non-functional

Multicystic dysplastic kidney
Case 6
Significant findings
  • The fetal membranes have funneled almost all the
    way down the cervix, leaving a very short closed

Clinical correlation
  • A short cervix in the second trimester predicts
    a high risk of preterm delivery
  • Benefit of cerclage controversial
  • Cervix is best visualized by transvaginal

Membrane funneling in cervix
Case 7a (video clip)
Significant findings
  • Uterus filled with small cysts (hasnt looked
    like a snowstorm since 1970s!)
  • Tissue is quite vascular

Clinical correlation
  • Usually presents around 10-14 weeks with
    hyperemesis, size dates, bleeding
  • Prompt suction evacuation is indicated
  • Follow bHCG levels for one year. If they dont
    fall normally, patient may need chemo for
    gestational trophoblastic neoplasia
  • Effective contraception very important
  • 46XX - Empty egg fertilized by single sperm
    with reduplication of the haploid karyotype

Molar pregnancy (hydatidiform mole)
Case 7b
Significant findings
  • Large ovaries, filled with prominent cysts
  • Similar in appearance to multiple cysts seen in
    ovulation induction with gonadotropins

Clinical correlation
  • Found in patients with hydatidiform mole
  • Results from high levels of gonadotropins- HCG
    in the case of a mole
  • Spontaneous resolution once the gestational
    trophoblastic disease has been treated and HCG
    returns to normal

Theca lutein cysts (with mole)
Case 8 (a)
Significant findings
  • No intrauterine gestational sac
  • No hemoperitoneum in this case
  • An intrauterine gestational sac should always
    be seen if the ßHCG is above 1,500 mIU/ml
  • Be careful to not confuse a pseudogestational
    sac with a true sac. A true sac has a double
    sac sign- an inner trophoblastic rim surrounded
    by the endometrial lining
  • Evaluate for hemoperitoneum when ectopic is
  • Blood looks different than peritoneal fluid- it
    contains clumps of clotted blood and the liquid
    component is echogenic.

Unruptured ectopic pregnancy
Case 8 (b)
Significant findings
  • Normal right ovary- (O)
  • Ectopic pregnancy (E) with a gestational sac,
    yolk sac, and tiny embryo. It is adjacent to,
    but clearly separate from, the right ovary

Clinical correlation
  • If 1,500 and dont see IUP pt needs clinical
    evaluation at that time (Completed abortion vs
  • Can often see gestational sac or obvious
    findings of ectopic at lower levels
  • If follow bHCG levels
  • Completed abortion falls
  • Live IUP doubles in 48 hours
  • Ectopic- variable

Ectopic pregnancy with a live embryo
Case 9
Significant findings
  • Head enlarged
  • Lateral ventricles markedly dilated
  • Dangling choroid plexus
  • Normal brainstem, cerebellum and posterior fossa
  • Blown out 3rd ventricle communicates freely
    with lateral ventricles.

Clinical correlation
  • Aqueductal stenosis one of many causes of
    hydrocephalus (others include NTD, DWM,
    holoprosencephaly, CMV infection, v. of Galen,
  • 10- 50 have IQ in the normal range
  • Prognosis not predictable with prenatal
    ultrasound findings
  • Head may become enormous
  • Deliver by cesarean after 35 weeks gestation
    when pulmonary maturity documented

Severe hydrocephalus (Aqueductal stenosis)
Case 10
Significant findings
  • Free-floating loops of bowel anterior to fetal
  • Not covered by membrane (in contrast to
  • Defect to right of umbilical cord insertion
  • Thickened bowel wall
  • Stomach often dilated from relative obstruction
    (not in this case)

Clinical correlation
  • Usually no associated anomalies outside GI tract
  • IUGR common
  • Non-reassuring fetal heart rate patterns common
  • 5 mortality
  • Stillbirth, bowel infarction, sepsis
  • Vaginal delivery OK to try, but cesarean common
  • About half require silo rather than primary

Case 11
Significant findings
  • Umbilical vessel runs through membranes across
    internal cervical os
  • Requires vellamentous cord insertion (ie inserts
    into membranes) or succenturiate lobe of placenta

Clinical correlation
  • Very high mortality if not recognized prenatally
    (fetal exsanguination when membranes rupture)
  • Umbilical vessels subject to compression by
    fetal head
  • Look for vasa previa if low-lying placenta or
    loops of cord noted in lower uterus
  • Confirm with transvaginal color Doppler

Vasa previa
Case 12
Significant findings
  • Large echogenic mass involves entire left lung
  • Heart displaced to the right
  • Diaphragm depressed
  • Polyhydramnios

Clinical correlation
  • Three types of CCAM
  • I- 2-10 cm cysts
  • II- cysts
  • III- Individual cysts not visible, very small
    cysts give strongly echogenic appearance to
  • Type III most likely to cause hydrops and
    neonatal compromise

Congenital cystic adenomatoid malformation (Type
Case 13
Significant findings
  • First image shows low- resistance flow (good
    forward flow in diastole)
  • Second image shows reverse diastolic flow

Clinical correlation
  • High umbilical resistance (low or reversed
    diastolic flow) associated with an increased rate
    of IUGR and other problems from placental
  • In an IUGR fetus with absent or reverse
    diastolic flow, delivery is indicated if near
    term. In preterm, careful surveillance to
    prevent intrauterine asphyxia or death

Abnormal umbilical blood flow pattern (2ond panel)
Case 14
Significant findings
  • Large membrane-covered sac arising from
    abdominal wall defect
  • Omphalocele sac filled with fetal liver
  • Cord inserts into sac (not shown)

Clinical correlation
  • Prognosis depends on associated malformations
  • 80 have other anomalies- esp cardiac
  • 30 have abnormal karyotype
  • Size of defect often appears larger in second
    trimester than at term
  • Delivery by cesarean section if liver in
    omphalocele sac

Case 15 (video clip)
Significant findings
  • No membrane separating twins
  • Neither twin stuck to uterine wall
  • Not conjoined
  • Cords intertwined (not shown)

Clinical correlation
  • Only 2 of monozygotic twins are monoamniotic
  • Division occurs 8-14 days after ovulation
  • Cords knotted together in almost all cases
  • Very high mortality, therefore careful
    monitoring in third trimester
  • If no membrane seen- look for diamniotic with
    twin-to- twin transfusion. Membrane is closely
    applied to stuck twin

Monoamniotic twins
Case 16
Significant findings
  • Significantly dilated ureter (ur)
  • Kidney (K) is hydronephotic with dilated renal
    pelvis and calyces
  • Bladder is not enlarged

Clinical correlation
  • Dilated upper urinary tract with normal bladder
    most commonly due to reflux
  • Vesicouretero junction obstruction is possible,
    but less common. Often has ureterocele
  • Hydronephrosis usually doesnt affect pregnancy
    management- pre term delivery or fetal surgery
    not considered
  • Usually good outcome if prompt postnatal care

Vesicoureteral reflux
Case 17
Significant findings
  • Polyhydramnios (not shown here)
  • Dilated stomach and proximal duodenum (double

Clinical correlation
  • 30 of fetuses with duodenal atresia have Down
  • Relatively few Down syndrome fetuses have
    duodenal atresia
  • Often causes severe polyhydramnios
  • Surgical repair usually uncomplicated

Duodenal atresia
Case 18
Significant findings
  • Thick, anechoic layer between soft tissue of
    neck and skin

12 week fetus
Clinical correlation
  • Standardized measurement used in conjunction
    with maternal serum (high B-HCG, low pregnancy
    associated plasma protein-A) as first trimester
    aneuploidy screen
  • This screening detects about 85 of trisomy 21,
    most trisomy 18 and 13 with 5 screen positive
  • Nasal bone present in this fetus. Absent nasal
    bone is a marker for TS 21.

Thick nuchal translucency
Case 19
  • Calvarium not seen
  • BPD cannot be measured
  • Head ends above level of the eyes
  • Eyes appear prominent- frog eyes
  • May have angiomatous stroma above the base of
    the skull that degenerates in the second
    trimester leaving the typical anencephaly

Clinical correlation
  • Comprises about half of neural tube defects
  • Multifactorial causation
  • Family history
  • Folate deficiency
  • Valproic acid, Tegretal
  • Polyhydramnios frequent (abnormal swallowing)
  • Failure to go into labor (absent pituitary
  • Lethal in early life

Case 20 (Video clip)
Significant findings
  • Transvaginal view showing embryo within the
    gestational sac. There is a clot in the
    endometrial cavity

Clinical correlation
  • Spontaneous abortion occurs in
  • 15 of all recognized pregnancies
  • 3 if no symptoms and normal ultrasound
  • 5 if bleeding and normal ultrasound
  • 15 If bleeding and intrauterine clot

First trimester intrauterine clot outside the
gestational sac
Case 21
Significant findings
  • 1/3 of the placenta shown here composed of clot
    from placental separation
  • Blood from the margin of the placenta may lodge
    between the chorion and uterine wall (a
    subchorionic hematoma)
  • A normal ultrasound doesnt exclude abruption-
    all the blood may have passed

Clinical correlation
  • Major risk factors for abruption include
  • Smoking
  • Hypertension
  • Smoking and cocaine use
  • Blunt abdominal trauma
  • Usually presents with bleeding, abdominal pain,
    hypertonic uterine contractions
  • May cause fetal distress, maternal DIC

Abruption with retroplacental hematoma
Case 22
Significant findings
  • Dilation of renal pelvis
  • AP measurement in axial view, abnormal if
  • 4 mm AP up to 32 weeks
  • 7 mm AP beyond 32 weeks
  • Normal contralateral kidney, bladder filling,
    and amniotic fluid
  • Ureters not dilated

Clinical correlation
  • Cutoffs listed above picked to maximize
    sensitivity to detect newborns with significant
  • Many fetuses with mild hydronephrosis become
    normal after birth (decreased urine output)
  • A weak marker for Trisomy 21

UPJ obstruction
Case 23
Significant findings
  • Easiest to diagnose with color Doppler as
    umbilical arteries sweep around bladder (Bl)
  • Cross section of the cord demonstrates two
    vessels (arrows)- more difficult to see in early
    second trimester or obese woman

  • 1 of all pregnancies
  • 20 with SUA have other malformations
  • A risk factor for aneuploidy (half of trisomy 18
    have SUA), but usually aneuploid fetuses have
    other findings as well
  • Increased rate of IUGR, prematurity

Single umbilical artery
Case 24
Significant findings
  • No amniotic fluid
  • Hypoplastic, distorted chest
  • Look for presence of kidneys, bladder filling
  • Evaluate for abnormal appearing placenta,
    high-resistance umbilical artery flow

Clinical correlation
  • Second trimester anhydramnios
  • Differential includes
  • Bilat renal agenesis or other urinary tract abn
  • Premature rupture of membranes
  • Severe placental insufficiency
  • Usually lethal (Oligohydrdamnios sequence)
    cause of death is pulmonary hypoplasia
  • First trimester amniotic fluid doesnt depend on
    renal function- can be normal with BRA
  • Unilateral agenesis 10 x more common
  • BRA usually sporadic. There are autosomal
    dominant forms sono kidneys of close family

Case 25 (one patient)
Significant findings
  • Thick nuchal skin
  • Absent or hypoplastic nasal bone
  • Atrioventricular septal defect
  • Echogenic bowel
  • Echogenic intracardiac focus
  • Clinodactyly and hypoplastic middle phalynx 5th
  • Other TS 21 markers (not shown)
  • Short humerus or femur
  • Pyelectasis

Trisomy 21
Case 26
Significant findings
  • Small cranium if significant brain extruded
  • Defect in occiput through which most of the
    brain protrudes. The brain is within an
    encephalocele sac

Clinical correlation
  • Least common form of neural tube defect (5)
  • 80 are occipital
  • Associated with an elevated maternal serum AFP
  • Prognosis depends on the amount of brain tissue
    within the encephalocele. An occipital
    meningocele, with no extruded brain tissue
    compatible with a good prognosis

Case 27
Significant findings
  • Absence of hypoechoic layer of myometrium
    between placenta and bladder wall
  • Vascular lacunae in placenta in same area
  • May invade into or through bladder wall

Clinical correlation
  • Risk factors include placenta previa and prior
    uterine surgery (esp. cesarean, myomectomy)
  • If placenta previa and multiple prior cesareans,
    incidence as high as 40
  • Important to diagnose before birth so that
    surgeons can make preparations for hysterectomy,
    difficult bladder dissection, severe hemorrhage
  • Sono to screen, MRI to confirm if ultrasound

Placenta percreta
Case 28
Significant findings
  • Donor twin (d) stuck to anterior uterine wall.
    Thin membrane adherent to fetus because of
    severe oligohydramnios
  • Polyhydramnios in sac of recipient (r)
  • Enlarged bladder in recipient

Clinical correlation
  • TTTS occurs in about 1/7 of monochorionic twin
    pregnancies (never in dichorionic)
  • Severe cases usually manifest at 16-20 weeks
  • Other findings- large/empty bladders, myocardial
    hypertrophy (recipient), hydrops (usually in
    recipient twin first), abnormal Doppler studies
  • 80 mortality when early, severe
  • Preterm delivery (severe polyhydramnios)
  • Volume overload (recipient) or inadequate
    circulation (donor)
  • Treatments- Repeated reduction amniocentesis or
    laser coagulation of connecting vessels

Twin-to-twin transfusion syndrome
Case 29
Significant findings
  • Large posterior nuchal cystic hygroma
  • Skin edema
  • This fetus had generalized hydrops

Clinical correlation
  • 80 of fetuses with cystic hygroma have
    aneuploidy (most commonly Turner syndrome)
  • Causes the webbed neck seen in neonates with
    Turner syndrome
  • Cystic hygroma and overt hydrops has 100 fetal
    mortality- usually before 24 weeks
  • Over 100 causes of hydrops- include aneuploidy,
    severe anemia from alloimmunization or
    parvovirus, fetomaternal hemorrhage, structural
    heart defect, TORCH, fetal brady or
    tachyarrhythmia, AVM

Cystic hygroma with hydrops, 45 X karyotype
Case 30
Significant findings
  • Anhydramnios
  • Very large bladder
  • Hydronephrosis, dilated ureters
  • Echogenic or cystic renal parenchyma (not shown
  • Small fetal chest due to hypoplastic lungs

Clinical correlation
  • Normal amniotic fluid after 14 weeks requires
    fetal urine contribution
  • If complete obstruction, newborn dies of
    pulmonary hypoplasia, renal dysplasia
  • Prognosis better if fetus maintains normal
    amniotic fluid-signifies incomplete obstruction
  • Placement of vesicoamniotic shunt can sometimes
    prevent lethal pulmonary hypoplasia

Bladder outlet obstruction
Case 31
Significant findings
  • Sagittal view shows placenta over region of
  • The anterior myometrium appears intact, no large
    venous sinuses in the placenta- thus placenta
    acreta is not suspected

Clinical correlation
  • Major risk factors for placenta previa include
  • Multiparity
  • Prior cesarean or other uterine surgery
  • 80 of cases of placenta previa diagnosed before
    18 weeks resolve
  • Unlikely to resolve if persists into third
    trimester or if central previa
  • Careful transvaginal or transperineal ultrasound
    helps exclude false and negatives
  • 15 need hysterectomy at time of cesarean

Placenta previa
Case 32 (a)
Significant findings
  • Thick membrane
  • Lambda (twin peak) sign (arrow)
  • Separate or fused placentas
  • Same or unlike sex

Clinical correlation
  • Usually dizogotic (always if unlike sex)
  • Can be monozygotic with very early division

Dichorionic twins
Case 32 (b)
Significant findings
  • Thin whispy membrane
  • No lambda sign
  • Always one placenta
  • Always same sex

Clinical correlation
  • Of monozygotic twins, time of division determines
    number of chorions/ amnions
  • 0-3 days Dichorionic/ diamniotic
  • 4-8 days Monochorionic/ diamniotic
  • 8-13 days Monochorionic/ monoamniotic
  • 13 days Conjoined twins
  • Monochorionic twins increased risk for
  • Fetal anomalies
  • 15 twin to twin transfusion
  • IUGR
  • Villamentous cord insertion
  • Fetal death

Monochorionic twins
Case 33
Significant findings
  • Small LV
  • Very small ascending aorta (not shown)
  • Retrograde filling of the aortic arch through
    ductus (not shown)

Clinical correlation
  • Evaluate for other malformations, offer
    amniocentesis for karyotype
  • Usually stable fetal course
  • Requires PGE at birth to keep ductus open
  • Staged Norwood procedure- long term survival

Hypoplastic left heart syndrome
Case 34 (a)
Significant findings
  • Clenched fist, overriding index finger
  • VSD
  • Rocker bottom foot

Clinical correlation
  • Second most common trisomy (after Trisomy 21)
  • Second trimester Tri- screen detects many cases
    (all analytes low)
  • Early neonatal death

Trisomy 18
Case 34(b)
Significant findings
  • Choroid plexus cyst
  • Strawberry shaped head (brachycephaly, frontal

Clinical correlation
  • Isolated CP cyst seen in about 1-2 of normal
  • Resolve spontaneously by 26 weeks- no sequellae
  • 2 of fetuses with CP cysts have trisomy 18.
    There are almost always other signs.
  • Most trisomy 18 fetuses have brachycephaly

Trisomy 18
Significant findings
Case 34(c)
  • Small lower jaw
  • Absent nasal bone

Clinical correlation
  • ANB seen in trisomy 21 as well
  • To dx micrognathia critical that true sagittal
    image obtained
  • Other genetic syndromes with micrognathia
  • Pierre Robin sequence
  • Cornelia- De Lange syndrome
  • Russell-Silver syndrome
  • Miller- Diecker syndrome
  • Diastrophic dysplasia
  • Severe micrognathia (e.g. with P.R. sequence)
    can cause airway emergency at birth

Trisomy 18
Case 35 (video clip)
Significant findings
  • Amorphous embryo with no fetal heart activity
  • No yolk sac seen

Clinical correlation
  • Cardiac activity usually seen at about 5 weeks
    (menstrual) as a pulsation adjacent to the yolk
  • Can confidently diagnose embryonic death if
    fetal pole measures 5 mm (with good equipment)
    and no cardiac activity
  • Management can be expectant, dilation and
    evacuation, or medical evacuation with misoprostol

Embryonic death
Case 36
Significant findings
  • Brachycephaly, small head
  • Undivided lateral ventricle
  • Cerebral cortex not divided
  • Bulbous thalamus (Th)
  • Proboscis arises above level of orbits (not shown

Clinical correlation
  • Failure of cleavage of the prosencephalon
  • Defects in brain and face
  • Alobar form incompatible with prolonged
    postnatal life
  • Most are sporadic, 20 trisomy 13, some are
    autosomal dominant with variable penetrance

Alobar holoprosencephaly
Case 37
Significant findings
  • Enlarged, echogenic kidneys
  • Cysts are not visible sonographically (1-2 mm)
  • Anhydramnios
  • Narrow chest from pulmonary hypoplasia

Clinical correlation
  • Autosomal recessive inheritance
  • Age of onset varies
  • Prenatal onset with anhydramnios is lethal- death
    due to pulmonary hypoplasia
  • Most have renal failure within first few years
    of life

Infantile polycystic kidney disease
Case 38
Significant findings
  • Stomach not seen in left upper abdomen (should
    always be visualized after first trimester)

Clinical correlation
  • Severe polyhydramnios may lead to preterm labor,
    severe discomfort, maternal respiratory distress-
    reduction amniocentesis can be done
  • Esophageal atresia usually associated with TE
    fistula. Fistula connects distal esophagus with
    trachea in 90 of cases

Esophageal atresia
Case 39
Significant findings
  • Transverse view at the uterine fundus with and
    ectopic pregnancy in the left interstial portion
    of the tube
  • Note the trophoblastic rim
  • The pregnancy is eccentric within the uterus
  • There is a thin rim (

Clinical correlation
  • About 2 of all ectoptic pregnancies
  • Because myometrium can expand, can grow longer
    before rupture than tubal ectopic
  • Chance of catestropic bleeding if ruptures
    because of abundant blood supply of myometrium

Interstitial (cornual) ectopic pregnancy
Case 40
Significant findings
  • Well circumscribed echogenic mass in lower lobe
    of left lung
  • Mass receives blood supply from aorta (not
  • No polyhydramnios (in this case)

Clinical correlation
  • Derives from embryonic foregut
  • Intralobar or extralobar, depending on if it
    arises before or after development of the pleura
  • Extralobar usually found between lower lobe and
  • Many other potential sites- some below diaphragm
  • Polyhydramnios frequent
  • May need immediate respiratory support

Pulmonary sequestration
About PowerShow.com