PDF The Management of Disorders of The Child S Cervical Spine 1st Edition Jonathan H. Phillips (Editor-In-Chief) Download
PDF The Management of Disorders of The Child S Cervical Spine 1st Edition Jonathan H. Phillips (Editor-In-Chief) Download
PDF The Management of Disorders of The Child S Cervical Spine 1st Edition Jonathan H. Phillips (Editor-In-Chief) Download
com
https://textbookfull.com/product/the-management-
of-disorders-of-the-child-s-cervical-spine-1st-
edition-jonathan-h-phillips-editor-in-chief/
DOWLOAD NOW
https://textbookfull.com/product/atlas-of-craniocervical-
junction-and-cervical-spine-surgery-1st-edition-stefano-boriani/
https://textbookfull.com/product/handbook-of-discrete-and-
combinatorial-mathematics-second-edition-kenneth-h-rosen-editor-
in-chief/
https://textbookfull.com/product/the-chief-the-life-and-
turbulent-times-of-chief-justice-john-roberts-first-edition-
biskupic/
https://textbookfull.com/product/nfa-the-point-of-cervical-turn-
first-edition-stephen-olugbade/
Imaging in Spine Surgery Jeffrey S. Ross
https://textbookfull.com/product/imaging-in-spine-surgery-
jeffrey-s-ross/
https://textbookfull.com/product/pathomechanics-of-common-foot-
disorders-douglas-h-richie-jr/
https://textbookfull.com/product/the-call-of-the-wild-and-free-
reclaiming-wonder-in-your-child-s-education-ainsley-arment/
https://textbookfull.com/product/the-routledge-handbook-of-
philosophy-of-temporal-experience-1st-edition-ian-phillips/
https://textbookfull.com/product/the-chief-of-rally-tree-a-
novel-2nd-edition-boyden/
The Management
of Disorders of the
Child’s Cervical Spine
Jonathan H. Phillips
Editor in Chief
Daniel J. Hedequist
Suken A. Shah
Burt Yaszay
Editors
123
The Management of Disorders
of the Child’s Cervical Spine
Jonathan H. Phillips
Editor in Chief
Daniel J. Hedequist • Suken A. Shah
Burt Yaszay
Editors
The Management
of Disorders of the
Child’s Cervical Spine
Editor in Chief
Jonathan H. Phillips, MD
Arnold Palmer Hospital
Orlando, FL, USA
Editors
Daniel J. Hedequist, MD Suken A. Shah, MD
Harvard Medical School Nemours/Alfred I. DuPont Hospital
Boston, MA, USA for Children
Wilmington, DE, USA
Burt Yaszay, MD
Rady’s Children’s Hospital Associate
San Diego, CA, USA
In the early 1970s, I became interested in the cervical spine, specifically con-
genital anomalies. That led to the publication of a report on the Klippel-Feil
syndrome. I was fortunate to find a monograph entitled Upper Cervical Spine
published in 1972. The authors, Detlef von Torklus and Walter Gehle, were
from the Orthopedic Clinic and Outpatient Department of the University
Hospital in Hamburg, Germany. They had done an extensive review of the
literature and pathoanatomy of the cervical spine, and, importantly, nearly
half of their book was devoted to children. The authors identified many nor-
mal physiologic and anatomic variations that frequently mimic pathology.
Unlike the extremities, in spine issues, one cannot use a comparison X-ray of
the opposite side. Their work identified variations in the pediatric spine and
how they differed from the adult. This text became my go-to source for
insight in complex cervical spine problems.
The Management of Disorders of the Child’s Cervical Spine edited by
Jonathan Phillips, Daniel Hedequist, Suken Shah, and Burt Yaszay continues
that legacy. This text is comprehensive and includes an extensive review of
previous literature by individuals knowledgeable in the management of chil-
dren with complex cervical spine problems.
Part I, Basic Medical Science, is essential to effective diagnosis and treat-
ment. This section contains important chapters on anatomy, biomechanics,
radiology, advanced imaging, and current diagnostic techniques.
Part II, Clinical Aspects of Disorders of the Child’s Cervical Spine, con-
tains an extensive discussion of trauma to the immature spine and its potential
for serious morbidity and mortality. There is a special section on cervical
injury in the young athlete. The clinical aspects of many of the disorders that
can affect the child’s spine are presented in detail. This list is comprehensive
and includes inflammatory conditions, infection, tumors, congenital anoma-
lies, metabolic disorders, and bone dysplasias.
Part III, The Medical and Surgical Treatment of Cervical Disorders in
Children, covers management—including conservative techniques such as
immobilization and rehabilitation. Also included are surgical approaches,
including current instrumentation, anesthesia, and neurological monitoring.
There is a unique section on complications and revision surgery.
vii
viii Foreword
There is no one reason why we wrote this book. It came about, as so many
different things do, by way of a conversation at the dinner table. Suken Shah,
MD; Burt Yaszay, MD; and I were talking at such a dinner table in Orlando
at a meeting on early onset scoliosis. We all had a big interest in children’s
cervical spine problems, but agreed that they were pretty rare and there wasn’t
much of a forum for talking about them among us orthopedic surgeons who
specialize in pediatric problems.
I give Burt the credit for the statement that “peds cervical spine is the last
black hole in kids’ spinal knowledge” or something like that. And with that
prophetic statement the seed was sown.
Suken polled the membership of the Pediatric Orthopedic Society of North
America (POSNA), and within a very short time, we had a small but enthusi-
astic group of interested surgeons who formed the nidus of a new study group
which, for now at least, is called the Pediatric Cervical Spine Study Group
(PCSSG). The members of this international group have contributed most of
the chapters in this text, along with their fellows and other associates. We
meet a few times a year at POSNA and Scoliosis Research Society (SRS) and
International Congress on Early Onset Scoliosis (ICEOS) meetings and have
been supported by these organizations. I’m very happy to acknowledge their
support.
One of the early topics we discussed at PCSSG meetings was the possibil-
ity of writing a text that could guide the novice surgeon in this rare but dan-
gerous area. Both Fran Farley, MD, and Haemish Crawford, FRACS, were
the initial proponents of the idea and contributed chapters. Dan Hedequist,
MD, already was involved in writing a book for our publisher, Springer, and
put me in touch with Kris Spring in their New York office who has been
beyond patient in waiting for a long overdue final draft. Dan, Suken, Burt,
and I took on editorial responsibilities for this text, so the four of us are
responsible for its content.
There are many others who have put up with the long process of writing,
notably our families, of course. But I would also like to acknowledge the help
of my colleagues at Arnold Palmer Children’s Hospital in Orlando in disci-
plines apart from orthopedics, namely, neurosurgery, ENT, general surgery,
and physiatry, who have written chapters which complete the scope of this
book.
ix
x Preface
The final and most important thank you of all goes to my secretary and
friend of 20 years, Mary Regling, BA, who has been the “den mother” of the
PCSSG from its inception and the driving force behind getting this work
published. Without her, the project would have foundered and failed.
xi
xii Contents
xiii
xiv Contributors
This book was written for a wide audience. Some of its readers will be famil-
iar, or even expert, in the care of children with neck and cervical spine disor-
ders. Others will be completely new to the subject. Though its emphasis is on
the orthopedic and neurosurgical approach to children’s cervical spine, there
are chapters that are contributed by other disciplines. Thus, an ENT surgeon
who may be called upon to perform an anterior trans-oral approach to the
dens will be reassured by the account of this technique in Chapter 19. Chapter
21 focuses on non-spinal disorders which may present to physicians and oth-
ers encountering children with neck problems in their clinics. Knowing what
their significance is and which consultant to engage with in their management
is important.
While it is unwise to try to be all things to all people, it is hoped that this
is a reference that can be dipped into by the occasional reader looking for
something specific and also be a comprehensive guide to the young surgeon
embarking on a career which may include pediatric cervical spine surgery.
The area we cover is quite rare and quite dangerous for the unprepared.
Yet with the changing demographics of childhood trauma and increasing sur-
vival of children with previously lethal syndromes, we are encountering these
rare diagnoses with greater frequency.
The reader is encouraged to approach the text in a traditional fashion. We
are all anxious to know “how to do it,” but such enthusiasm must be tempered
by acquiring the building blocks of “why.” Thus, we start with basic science,
and it cannot be overemphasized how important a thorough knowledge of the
anatomy (both normal and abnormal), pathology, biomechanics, and radiol-
ogy is to treating these rare disorders. The chapters on clinical assessment
and presentation of the multitude of problems in this area follow. Only after
these basic areas are covered do we embark on accounts of the surgical and
nonsurgical management of the problems encountered.
Each chapter is written by experts in the area and can be taken as stand-
alone treatises. It is hoped, however, that the whole will be greater than the
sum of its parts.
Jonathan H. Phillips, MD
Daniel J. Hedequist, MD
Suken A. Shah, MD
Burt Yaszay, MD
xvii
Part I
Basic Medical Science
Embryology and Anatomy
of the Child’s Cervical Spine 1
Jonathan H. Phillips
Klippel-Feil syndrome, a failure of segmentation cells of the somitic mesoderm have spread toward
rather than a hemimetameric shift, though this this structure, which induces the formation of the
last can and does occur in the child’s neck, result- sclerotome. The sclerotomal segments (and this
ing in cervical congenital scoliosis. tissue mass is segmented) will form the verte-
Somites, or more properly their derivatives, brae, whereas the notochord, under the negating
sclerotomes, are the building blocks of the spine. influence of the neural tube, remains in the
They appear in increasing numbers during mature human only as the nucleus pulposus of
embryogenesis, and the number of these segmen- intervertebral discs and the alar and apical liga-
tal tissue blocks correlates with the anatomical ments of the craniocervical junction. This seg-
staging of the embryo. Somites are just one part mented system develops in a rostral to caudal
of the mesoderm layer of the three-layered early direction (Fig. 1.1).
embryonic disc. This disc, a few days old, has an Somite count increases from about one to four
outer epidermal layer facing the amniotic cavity, at age 20 days, first appearing at the head of the
a middle layer of mesoderm, and an endodermal embryo, to 34–35 at age 30 days toward the tail.
layer facing the yolk sac. This pattern is apparent Ultimately, 44 pairs of somites occur and form
by about 3 weeks postfertilization. The meso- the left and right half of the sclerotome. The other
derm is itself divided into three parts, medial, two parts of the somites go on to form muscle and
intermediate, and lateral mesoderm. The most skin. The remaining parts of mesodermal layer
medial band is called the paraxial mesoderm and lateral to the somites form splanchnic structures.
once again divides into three, this time from dor- These include gut, vascular, and urological struc-
sal to ventral. The area nearest the dorsal surface tures. Insult to the embryo at this stage can affect
is the dermatome, next the myotome, and further all these systems and explains the concomitant
to the center of the embryo is the sclerotome. All appearances in clinical practice of multi-system
of these areas are arrayed surrounding two struc- congenital formation failure. The best known
tures which carry powerful molecular signaling example of this is VACTERL syndrome in which
properties—the notochord in the very center of heart, gut, renal, and vertebral malformations
the embryo and the neural tube which by now coexist.
(stage 10 or about 4 weeks) has formed from the At about the 5- to 8-week period, or Carnegie
original neural plate and which lies right behind stages 15–22, the emerging pattern of spinal forma-
the notochord on its dorsal aspect. The notochord tion is becoming evident. However, the contribu-
will regress quickly, but not before the ventral tion of somites to their sclerotomal structures is
Fig. 1.1 The relationship and control of somatic mesoderm to the notochord and neural tube (Reproduced with permis-
sion from Gilbert [7]; © Sinauer Associates, Sunderland, MA)
1 Embryology and Anatomy of the Child’s Cervical Spine 5