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Ehlers-Danlos syndrome type VIB with characteristic facies, decreased curvatures of the spinal column, and joint contractures in two unrelated girls.

Two unrelated girls, aged 11 and 14 years, with clinical manifestations of Ehlers-Danlos syndrome (EDS) type VIB, characteristic facies, skeletal abnormalities, and other features are described. They had Marfanoid habitus with pectus excavatum; fragile, hyperextensible, and readily bruisable skin with widened, atrophic scars; recurrent hematomas; generalized joint laxity; hypotonia; scoliosis; and mild delay of gross motor development. Lysyl hydroxylase deficiency was ruled out in Patient 1. Parental consanguinity was present in Patient 2. They both had, in early childhood, down-slanting palpebral fissures, drooping lower eyelids, short nose, small mouth, and long philtrum. Facial features that persisted included thick eyebrows, hypertelorism, strabismus, blue sclerae, low-set, and slanted ears, hypoplastic columella, high-arched palate, and thin upper lip. They had tubular stenosis of the phalanges, metacarpals, and metatarsals; decreased physiological curvatures of the spinal column with tall vertebrae; and joint contractures including talipes equinovarus and progressive talipes valgus. Their hearing of high-pitched sounds was impaired. They had constipation and recurrent cystitis with an enlarged bladder. In view of these findings, we propose that these two girls represent a clinically recognizable subgroup of EDS type VIB.

Adolescent↗

Scoliosis after thoracotomy for esophageal atresia.

Progressive scoliosis was seen in eight children after thoracotomy for esophageal atresia. Postoperatively, all had had severe mediastinitis and empyema secondary to dehiscence of the esophageal anastomosis and required reoperation. Healing was accompanied by marked scarring and rib fusion; with growth, a scoliosis developed with the concavity toward the thoracotomy site. Most spinal curvatures appeared years after the thoracotomy and progressed rapidly at the time of adolescent growth spurt. Excision of fused ribs, spinal fusion, and instrumentation led to improvement in four patients.

Adolescent↗

Cervical spondylotic myelopathy: functional and radiographic long-term outcome after laminectomy and posterior fusion.

OBJECTIVE: To evaluate the long-term efficacy of cervical laminectomy with posterior lateral mass fusion/fixation in the treatment of patients with cervical spondylotic myelopathy (CSM). METHOD: Twenty-five patients treated for CSM by laminectomy and lateral mass fusion at the Division of Neurosurgery at The Ohio State University between 1989 and 1994 were studied retrospectively. Only patients with longer than 2-year postoperative follow-up durations were included. At follow-up examination, each patient completed an SF36 questionnaire, underwent a physical examination, underwent plain radiography showing the spinal curvature with plate and screw position, and underwent magnetic resonance imaging of the cervical spine, which evaluated dural sac decompression and spinal cord abnormalities. Patient-generated data were used for outcome measurements. RESULTS: The mean follow-up duration was 47.5 months. Good outcome was defined by the presence of three criteria: ability to walk unassisted (Grade IIIA or better), ability to write unassisted, and ability to manage buttons and/or zippers unassisted. The inability to meet these criteria was defined as a poor outcome. Two patients (8%) experienced complications that resulted from the surgery. There was no instability or progression to significant kyphosis. Lesions that were hyperintense on magnetic resonance images did not correlate with outcome. Eighty percent of the patients achieved good outcomes, and 76% had improved myelopathy scores. None of the patients had late neurological deterioration. Patients with better neurological statuses at the time of surgery (Grade IIIA or better) were more likely to improve (P < 0.0001); the likelihood of a change in status for those starting with poorer grades (IIIB or worse) was not statistically significant (P < 0.08). CONCLUSION: Cervical laminectomy with posterior fusion/fixation proved useful in the treatment of patients with CSM with straight or lordotic spines and multilevel compression. This therapy addresses the dynamic and compressive forces that are important in the pathogenesis of CSM, resulting in minimal complications and possible improvement in long-term outcomes.

Adult↗

Comparative multifactorial analysis of the effects of idiopathic adolescent scoliosis and Scheuermann kyphosis on the self-perceived health status of adolescents treated with brace.

Bracing is the most effective non-operative treatment for mild progressive spinal deformities in adolescence but it has shown a considerable impact on several aspects of adolescents' functioning. This cross-sectional study investigated the self-perceived health status of adolescents with the two most common deformities, treated with body orthosis. Seventy-nine adolescents with spinal deformities (idiopathic adolescent scoliosis, thoracic Scheuermann kyphosis) and 62 adolescents without spinal deformities were asked to complete the Quality of Life profile for Spine Deformities Instrument. This study showed that adolescents with deformities are significantly less likely to have back pain in training than controls, but more likely to have difficulty in forward bending, and in the most common daily activities while in brace. These individuals claim they wake up because of back pain and feel quite nervous with the external appearance of their body. These patients face often problems with their relations with friends, while they reported difficulties in getting up from bed and sleep at night more often than their counterparts without deformities. As they grow older, patients feel increasing ashamed of their body, as they are more concerned about the future effect of the deformity on their body. As the bracing time increases, patients have much more probability than controls to get low back pain. Girls with deformity have a higher probability than boys to get low back pain while working in the house and while training. Individuals with larger spinal curvatures have more difficulties in bending and increased incidence of back pain than their counterparts with smaller curvatures. Psychological reasons associated mainly with relations at school and back pain are the main causes for low compliance in adolescents with spinal deformities treated with body orthosis. Careful instructions for all individuals who will undergo brace therapy, psychological support for all patients who develop psychological reactions and physical training particularly for older girls should be recommended to increase bracing compliance.

Adolescent↗

The correction of spinal deformity in idiopathic torsional dystonias.

The torsional dystonias constitute a group of motion disorders of unknown etiology with variable onset, progression, and severity that frequently result in spinal curvature. Four patients with this uncommon disorder, with curves averaging 70 degrees (range, 55 to 95 degrees), underwent surgical correction for progressive spinal deformity. All of them had improvement in function postoperatively, but there was a high rate of postoperative complications.

Adolescent↗

Can juvenile scoliosis be corrected by circumscribed radium-irradiation of the spine?

In 1936 scoliosis was produced in growing animals by exposing one side of one or more vertebrae to radium action. The purpose of this treatment was to recurve existing curvatures of the spine on the same principle. No attempt has been made so far to correct congenital scoliosis of infants by this method. Hundreds of infants treated by X-ray for Wilms' tumor developed incidental spinal curvatures. In none of these cases was there any recorded mention of damage to the spinal cord or any other organ. Since the epiphyseal plate is much more sensitive to radiation than is the Wilms' tumor and radium radiation can be more easily controlled than X-radiation, it is suggested that scoliosis of genetic or other etiology might be successfully treated by radium or possibly other gamma rays. The choice of the rays and the dosage must be left to the experts.

Animals↗

Pathogenesis of idiopathic scoliosis. The Nottingham concept.

There is no generally accepted scientific theory for the etiology of idiopathic scoliosis. Hence, current treatment is pragmatic and not based on knowledge of causation of the deformity. In Nottingham, we have evaluated data from studies of the hips, pelvis, spine, rib cage and trunk muscles in scoliotic (pre- and post operative) and control patients, cadavers and a mechanical model to formulate a new theory of etiology for idiopathic scoliosis (figs. 18 & 19 of ref. 15). Evidence is summarized for the view that idiopathic scoliosis results, in part, from a developmental abnormality in the central nervous system creating rib-vertebra angle asymmetry which leads to a cyclical failure of mechanisms of rotation control in the trunk; these involve rotation-inducing (pelvic) and rotation-defending (discal, ligamentous and costal) mechanisms acting mainly in gait. The mechanical breakdown of rotation occurs in association with a lateral spinal curvature and a lordotic segment to create the initial deformity of idiopathic scoliosis. Then, growth, both abnormal (secondary to vertebral hyper-pressures) and normal (linear spinal growth) with gravity adds to the initiating and continuing neuromuscular mechanisms to augment curve progression. This theory views the spine in the wider perspective of function in the trunk, evolution and development, all in relation to bipedalism. The goal of etiological research is ultimately to base a treatment on some knowledge of causation of the deformity.

Central Nervous System↗

Spinal anesthesia for cesarean delivery. A comparison of two doses of hyperbaric bupivacaine.

BACKGROUND AND OBJECTIVES: Hyperbaric local anesthetic pools in the thoracic spinal curvature in supine patients. The authors hypothesized that patients receiving 12 or 15 mg of hyperbaric bupivacaine would achieve similar levels of sensory block but the spinal anesthetic would be denser and longer lasting in patients receiving the 15 mg dose. METHODS: Twenty eight healthy term parturients scheduled for elective cesarean delivery randomly received 12 or 15 mg hyperbaric 0.75% bupivacaine in 8.25% dextrose. Patients were in the right lateral position during drug injection and were then positioned supine with left uterine displacement on a horizontal operating table. A blinded anesthesiologist assessed the dermatome level of sensory analgesia to pinprick every 2 minutes for 20 minutes, then every 15 minutes until the sensory level regressed to T10. RESULTS: The mean level of sensory anesthesia was 2.2 spinal segments higher in patients receiving 15 mg versus 12 mg hyperbaric bupivacaine (24.8 +/- 3.7 versus 22.6 +/- 1.4 spinal segments; P = .031). Regression to T10 occurred more quickly in the 12 mg than in the 15 mg group (140.0 +/- 16.5 versus 162.1 +/- 33.8 minutes, P = .046). Patient height did not correlate with the maximum number of spinal segments blocked in either group. All patients had adequate surgical anesthesia. CONCLUSIONS: Parturients receiving 15 mg of hyperbaric bupivacaine developed a higher mean level and longer duration of sensory analgesia than those receiving 12 mg.

Adult↗

Atypical idiopathic scoliosis: MR imaging evaluation.

The authors analyzed the clinical and imaging findings in 30 consecutive pediatric, adolescent, and young adult patients who underwent MR imaging because of atypical features of idiopathic scoliosis. Atypical clinical and plain radiographic features included early onset (n = 4), rapid progression (n = 19), pain (n = 17), other neurologic symptoms or signs (n = 12), associated syndromes (n = 4), a convex left thoracic or thoracolumbar curve (n = 18), a kyphotic component (n = 7), and pedicle thinning (n = 4). MR imaging demonstrated 17 abnormalities in 11 patients: lumbar disk protrusions (n = 1), patulous intradural space (dural ectasia) (n = 3), hydrosyringomyelia (n = 7), Chiari I malformation (n = 5), and cord astrocytoma (n = 1). Significant associations with abnormal MR imaging findings were shown for patients with pain, weakness, abnormal neurologic findings, and atypical curvatures. Furthermore, there was a striking association of convex left thoracic or thoracolumbar scoliosis with hydrosyringomyelia (six of seven cases). On the basis of these results, "atypical" spinal curvatures at radiography and "atypical" clinical features should prompt performance of additional diagnostic studies.

Adolescent↗

[Sacral bone tuberculosis in a 6 year-old child].

BACKGROUND: Spinal tuberculosis is now rare in developed countries; its appearance in sacral vertebrae is exceptional. CASE REPORT: A 6 year-old boy was admitted because he had suffered from lumbar pain and rigidity for 24 hours, limiting anterior flexion. X-rays of the spine was normal, but a CT-scan showed lytic lesions of the sacrum. Bone scintigraphy showed no inflammatory lesions. Ewing sarcoma was diagnosed: surgical biopsy showed a cold abscess containing many bacilli that where resistant to decoloration with acid-alcohol. They were cultured for 12 days and identified as Mycobacterium tuberculosis. The boy had been given a BCG vaccination at the age of 2 years and was not immunodeficient. He was treated with isoniazid, rifampin and pyrazinamide for 2 months followed by isoniazid plus rifampin for 1 year. A cold abscess in the presacral area rupturing into the sacro-iliac articulation pointed above the left iliac wing during treatment and was treated by surgical debridement. Eighteen months later, the boy is well but still avoids bending. CONCLUSION: A sacrally located bone tuberculosis is difficult to diagnose. Careful therapy is necessary to avoid sequelae that may lead to spinal curvature.

Child↗

The effects of rod contouring on spinal construct fatigue strength.

STUDY DESIGN: In vitro fatigue loading using a corpectomy model outfitted with posterior pedicle screw instrumentation. OBJECTIVE: The purpose of this study was to detect differences in fatigue resistance of titanium and stainless steel spinal constructs that use rods contoured using a French Bender, and to compare differences in fatigue resistance of contoured and straight titanium rods. SUMMARY OF BACKGROUND DATA: Instrumentation failure is generally thought to be caused by fatigue or cyclic loading. Intraoperative contouring of the posterior rods is almost always required to match the native kyphotic (thoracic) or lordotic (cervical or lumbar) spinal curvature. How bending these rods affects their overall fatigue resistance is not well described. In addition, changes in fatigue resistance may be a function of material type. METHODS: Spinal constructs were evaluated using the ASTM F1717-01 model. Two different titanium-based rods (Ti6AL4V and CpTi) and two different steel-based rods (Orthinox and 316L stainless steel) were evaluated in this study (n = 6 for each group). Rods were contoured at two points using a French Bender and were rigidly coupled to polyaxial pedicle screws within UHMWPE vertebral bodies. Constructs were cycled at a load ratio of 10 between a minimum and maximum loading regime of -250 N/-25 N and -700 N/-70 N at a frequency of 4 Hz. Estimated maximum nominal stresses at various points of interest in the spinal constructs were calculated using beam theory. Effects of the rod material, load, and stress on the number of cycles to failure were analyzed using Cox proportional hazards regression. RESULTS: All of the spinal constructs with contoured CpTi rods and contoured Ti6Al4V rods failed at one of the bends in the rods. Almost all of the spinal constructs with straight CpTi rods and straight Ti6Al4V rods failed where the blocker screw fastens the rod to the coupler of the polyaxial screw head. Contoured titanium constructs demonstrated significantly lower fatigue life than contoured 316L constructs. Contouring tended to lower the fatigue life of both the Ti6Al4V and CpTi constructs. CONCLUSION: Intraoperative rod contouring using a French Bender significantly reduces the fatigue life of titanium spinal constructs.

Bone Nails↗

Scoliotic index: a comparative evaluation of methods for the measurement of scoliosis.

A new technique of measurement--Scoliotic Index(SI)--was devised to obtain more accurate determination of the spinal curvature. In comparison with previously established methods (Ferguson, Cobb), the SI is a more comprehensive and accurate representation of the scoliotic curve. It measures that the deviation of each involved vertebral segment from the vertical spinal lines with multiple points taken along the scoliotic curve. The development of this technique proved by serendipity that the Ferguson and Cobb measurements of the angle of scoliosis are reliable and comparable at all degrees of curvature.

Humans↗

Cardiac and respiratory function before and after spinal fusion in adolescent idiopathic scoliosis.

Ten girls with adolescent idiopathic scoliosis were studied before and 17-23 months after spinal fusion. None had any cardiac or respiratory disease complicating the scoliosis. They underwent a range of resting lung function tests and a progressive exercise test. The mean angle of scoliosis decreased from 65.8 to 27.3 degrees after operation but the only significant physiological benefit detected in this study was a decrease in the submaximal minute ventilation. The physiological benefit of spinal fusion was therefore much less prominent than the anatomical improvement of the spinal curvature.

Adolescent↗

Viscoelastic behaviour of deformed spines under correction with halo pelvic distraction.

The applied tensile tractive force between skull and pelvis of the Halo Pelvic Distraction appliance has been measured using a simple compression spring device. Details of these external force measurements with daily distraction and correction of spinal deformity are illustrated for 10 patients which include tuberculous kyphoses, paralytic scolioses, and congenital and idiopathic scolioses. The relationships between applied load, time, amount of distraction, and extent of spinal curvature were studied in terms of the biomechanical proerties of elasticity and plasticity. A linear relationship exists between the total distraction distance and the reduction in the angle of the spinal deformity. For this correction procedure the rates of distraction, the total distraction amount, the total duration of the distractional period, and the maximum load depend on each individual spinal deformity with its particular peculiarities.

Adolescent↗

An assessment of the reliability of the Scoliometer.

Accurate noninvasive measurements of spinal curvature are crucial in planning treatment and assessing curve progression in adolescent idiopathic scoliosis. An inter-rater agreement trial and an intrarater agreement trial were undertaken to estimate the reliability of axial rotation measurement using the Scoliometer (Orthopedic Systems, Inc., Haywood, California). In the inter-rater trial, two orthopedic surgeons and two orthopedic surgery residents independently measured the thoracic and lumbar axial rotations of 22 patients with idiopathic scoliosis using the Scoliometer. In the intrarater, trial a single orthopedic surgeon measured the thoracic and lumbar axial rotations of 25 patients on four separate occasions with the Scoliometer. Inter-rater agreement using the Scoliometer to estimate the magnitude of the hump (in centimeters) in the thoracic and lumbar regions was poor (intraclass correlation coefficient, Rho = 0.57 and Rho = 0.76 for the thoracic and lumbar regions, respectively). Inter-rater agreement using the Scoliometer to estimate the degree of axial trunk rotation was better (Rho = 0.81 and Rho = 0.82 for the thoracic and lumbar regions, respectively). Intrarater agreement using this device to estimate the magnitude of the hump (in centimeters) in the thoracic and lumbar regions was good (Rho = 0.90 and Rho = 0.84 for the thoracic and lumbar regions, respectively). Intrarater agreement using the Scoliometer to estimate the degrees of curvature was outstanding (Rho = 0.995 and Rho = 0.998 for the thoracic and lumbar regions, respectively). These results indicate that the Scoliometer can be a reliable noninvasive method for repetitively assessing spinal axial rotation when used by a single trained observer.

Adolescent↗

Antalgic scoliosis due to nonosteogenic fibroma of the L1 neural arch: report of a case.

A case of nonosteogenic fibroma of the neural arch associated with scoliosis is reported. The unusual location of the neoplastic lesion and its close relationship with the lateral deviation of the spine are discussed. The necessity for accurate, early etiologic diagnosis is stressed. Early resection of the lesion led to resolution of the spinal curvature and pain.

Adolescent↗

The daily force pattern of spinal orthoses in subjects with adolescent idiopathic scoliosis.

The efficacy of orthotic treatment for children with abnormal spinal curvature has been hampered by the lack of comprehensive information about wear characteristics. A battery-powered microcomputer system was developed to monitor loads exerted by orthoses used to treat children with spinal deformities during daily living. The system not only records how well the orthosis has been used, but also helps to ensure that the orthosis is being worn as prescribed. Data acquisition is controlled by a microcontroller and can be programmed to have sample intervals ranging from 1 second to 1 hour. Low power control circuitry is designed so that the system can be operated by a battery. In a preliminary study, 16 subjects (3M, 13F) used this system from 1 to 16 days (9.3 +/- 5.0) with the prescribed hours between 16 to 23 hours (22.3 +/- 1.3). This study demonstrated the feasibility of the approach, and that this device may increase the understanding of orthotic mechanics, and may help patients to wear their orthoses in a better way.

Adolescent↗

Scoliosis in pediatric Chiari malformations without myelodysplasia.

A prospective study was undertaken in 1985 to better understand how the surgical manipulation of hindbrain herniation affected abnormal spinal curvature. Eleven patients under 16 years of age with Chiari malformation (not associated with myelodysplasia) and scoliosis of at least 15 degrees were studied. The mean curve angle at the time of original treatment was 29 degrees, with the convexity to the right in seven patients. The curvature was rapidly progressing in four patients. The most common presenting signs were myelopathy and weakness. Investigative procedures included spine radiographs with the patient standing and magnetic resonance (MR) imaging of the brain, spinal cord, and craniovertebral junction. Eight children had associated hydrosyringomyelia. Surgical intervention consisted of a dorsal posterior fossa decompression in all patients and a transoral ventral decompression of the cervicomedullary junction in five. All patients were followed at 3, 6, and 12 months, and at yearly intervals thereafter with clinical evaluations, spine radiographs in the standing position, and postoperative MR imaging. The mean follow-up period was 35 months. The scoliosis improved in eight patients, stabilized in one, and progressed in two. Only one child required postoperative spinal fusion and instrumentation for progression of scoliosis. Hematomyelia or hematobulbia was associated with persistent scoliosis in two patients. The presence of hydrosyringomyelia and bone erosion did not preclude curve improvement. All patients under 10 years of age had resolution of their scoliosis, despite preoperative curves of more than 40 degrees. These findings emphasize the importance of early surgical intervention, with the restoration of normal cerebrospinal fluid dynamics at the craniovertebral junction in children with symptomatic Chiari malformations.

Adolescent↗