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Case: Tethered Cord

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This was a one day old infant who, uh,

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underwent screening spine ultrasound

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for multiple congenital anomalies.

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This patient had esophageal atresia

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and so there was concern for ral malformation,

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so vertebral body anomalies, anorectal malformation,

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cardiac anomalies.

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The T is tra esophageal fistula,

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which this patient had the esophageal

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atresia version of that.

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Um, and then limb abnormalities is the l.

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So we are presented

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with this spine ultrasound in this one day old infant.

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So we are imaging with our linear high frequency transducer.

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This infant is in the prone position

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and we are starting in the longitudinal or sagittal plane,

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and we can see vertebral bodies

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and intervertebral disc spaces anteriorly.

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We see posterior elements at the, uh,

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at the superficial aspect of the screen

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because we are imaging from a posterior approach.

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And then here is our spinal cord

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and our spinal canal contents

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with a nice normal looking cord.

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Nice, normal, uh, looking central app penal canal

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and nice normal looking anaco CSF at the dorsal

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and ventral aspects of this cord.

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As we go inferiorly though, we're going to, uh,

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pay close attention to the morphology of our conus meis.

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We're gonna look at where are thecal sac ends,

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and we're gonna look at our phylum terminality.

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So when we're trying to guess,

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or trying to label appropriately the levels

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of the vertebral bodies,

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we're gonna in our mind's eye draw a line parallel

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to the lumbar spine vertebral bodies.

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We're gonna draw a line parallel

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to the sacral vertebral bodies

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and where they intersect is going to be L five S one.

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So this is L five. This is S one

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as a confirmatory thing we can do in this patient is the

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thecal sac should end at the S two vertebral body.

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So this is, uh, confirming

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that this vertebral body is S two.

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So S two sacral two, sacral one L five vertebral body,

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L four vertebral body n conus meis.

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It extends all the way to the L four vertebral body.

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Not only that, this is our phylum terminality

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and this looks just a little bit thick to me.

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Um, I don't see it measured, um, by our stenographer,

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but this is gonna be an abnormal, uh, lumbar spine, uh,

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abnormal position of the conus mellis

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concerning for tethered cord.

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So this patient will go on to MRI.

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So the t here is showing us

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that the coil segments are un ossified.

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We have normal, rectangular

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or square shapes of our sacral vertebral bodies.

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This is L five and again, our conus meis,

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we can see at the superior aspect

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of the screen here extends all the way to L four.

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So this is a low line conus meis.

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Um, we don't see evidence of a presacral mass, so don't,

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just don't forget to look at your vertebral bodies,

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look at the spinal cord contents, look at your, uh,

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coil segments, but also look at the rectum

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and see if there's any sort

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of abnormal heterogeneous mass in this infant.

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Especially in an infant with multiple congenital anomalies.

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You don't wanna miss a presacral mass, um,

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coexisting at the same time.

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Our tech has labeled the levels for us.

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Thank you stenographer. So this uh, spin is process.

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They have labeled as L three.

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So this is the L three vertebral body. This is L four.

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So they're counting matches our counting

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with this conus mellis extending all the way

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to the L four vertebral body.

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We're gonna look at our motion next.

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So on this cinematic image, uh, normally the nerve rootlets

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of the coquina

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and the conus midis move nice with, uh, respiratory motion

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with cardiac pulsations.

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And this just looks stuck.

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There's not a ton of movement of these nerve rootlets

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of the coquina surrounding this lowly conus meis.

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Um, this phylum terminology on the syn image doesn't look

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particularly thick, but it's not moving.

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So this is concerning for, um, lowly conus meis.

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So concerning for tethered cord, this patient will go on

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to lumbar spine, uh, screening

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or, uh, this patient will go on to follow up spine MRI

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to confirm findings and for preoperative planning.

Report

Text

Faculty

Judy H. Squires, MD

Associate Professor of Radiology

UPMC Children's Hospital of Pittsburgh

Tags

Ultrasound

Spine

Pediatrics

Neuroradiology

Neonatal

Musculoskeletal (MSK)

Congenital