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Biomedical subjects

Jean-Philippe Cahuzac

Publications and source records attributed to Jean-Philippe Cahuzac.

10 recordsLinked to original sources
PubMed2007

Classification of chance fracture in children using magnetic resonance imaging.

STUDY DESIGN: MRI study of pediatric Chance fracture. OBJECTIVE: To evaluate bone and soft tissue lesions in pediatric Chance fracture. SUMMARY OF BACKGROUND DATA: Several descriptions and classifications have been already developed for Chance fracture, but mainly for adult. Furthermore, they are all based only on radiographic studies. METHODS: MRI and radiographs of 18 children with Chance fracture were analyzed before treatment. RESULTS: On MRI, in all cases, no abnormal signs were noted on the intervertebral disc. Six patients had a bone fracture going through the pedicle and the vertebral body. Twelve patients had a physeal injury located on the superior or on the inferior vertebral endplate. Three types of lesions could be identified according to the location of the lesion in relation to the pedicle. CONCLUSION: MRI is useful in the diagnosis of pediatric Chance fracture. It allows physeal injury to be clearly identified from disc injury.

Adolescent↗
PubMed2006

["In-toeing and out-toeing"].

From birth to the end of growth, a femoral detorsion associated with a lateral tibial torsion can be observed. The absence or the exaggeration of this phenomenon leads to rotational abnormalities of the lower limbs called by parents as " in-toeing or out-toeing ". This represents one of the most frequent motives for consultation in pediatric orthopedics. The analysis of the respective position of knees and feet during walking and the measurements of femoral and tibial torsion allow the diagnosis of rotational abnormalities. During growth, the degree of these anomalies may increase or decrease spontaneously. As there is no evidence of a relationship between rotational abnormalities and arthritis, there are no preventive orthopaedic or surgical treatments. However, at the end of the growth, the persistence of functional symptoms leads to femoral or tibial derotation osteotomies.

Abnormalities, Multiple↗
PubMed2006

Surgical treatment of radial neck fractures in children by intramedullary pinning.

Various surgical techniques have been used to treat displaced radial neck fractures in children, in order to reduce the displacement and to avoid complications. We report the results of a retrospective study performed on 20 patients with severely displaced radial neck fractures, who were treated with intramedullary pinning (Métaizeau technique). Mean age at injury was 9 years. Clinical and radiographic evaluation was performed. At final follow-up, there were 17 (85%) excellent or good results, 1 (5%) fair and 2 (10%) poor. Complications noted were anterior epiphysiodesis in one case and avascular necrosis of the radial head in another. Heterotopic ossification, neurovascular deficit or deep infection were noted in no instance.

Adolescent↗
PubMed2005

Integra artificial skin in the management of severe tissue defects, including bone exposure, in injured children.

A dermal substitute, Integra (Integra Neurosciences Implants SA, Sophia Antipolis, France) artificial skin, was used for wound management on three children with lower limb injuries in our institutions. In one case this biosynthetic material was applied directly to a bony surface (patella). This technique allows an early wound coverage and provides a satisfactory preparation for autograft. It can be a useful adjunct in the treatment of severe tissue defects in child limb injuries.

Adolescent↗
PubMed2004

Wrist anomalies in Turner syndrome compared with Leri-Weill dyschondrosteosis: a new feature in Turner syndrome.

UNLABELLED: We analysed bone age radiographs in 102 girls with Turner syndrome and compared the findings with 93 control girls and nine girls with Leri-Weill syndrome. Various signs were analysed: radial bowing or Madelung deformity, maximal/minimal height of the radial epiphysis, brachymetacarpia of the 4th digit, carpal and epiphyseal angle, as well as a new sign the distal radio-ulnar physeal disparity. Two values differed significantly between the Turner group and the control group, the first being the epiphyseal angle which has already been reported to be greater in Turner syndrome, and the second being the new sign we have been able to describe. Turner patients had an increased distance between the ulnar and radial metaphysis, or "distal radio-ulnar physeal disparity", the ulnar being shorter. Furthermore, in 27% of cases the medial extremity of the ulnar epiphysis was flattened and passed below the distal extremity of the radius, whose medial part projected over the distal extremity of the ulna, thus reproducing in reverse the characteristic feature of Leri-Weill syndrome. In the growth hormone-treated Turner patients, we found a significant correlation between distal radio-ulnar physeal disparity and growth velocity expressed in cm/year (r = 0.28; P < 0.002) or in SDS/bone age (r = 0.21; P < 0.03) during the first year of treatment. CONCLUSION: the value of this new sign requires further investigation.

Case-Control Studies↗
PubMed2004

Congenital pseudarthrosis of the clavicle: a histopathological study in five patients.

Congenital pseudarthrosis of the clavicle is usually situated on the right clavicle. Pathological data on pseudarthrosis are scant. The histological analysis of five cases treated by 'en bloc' surgical resection are reported. Enchondral ossification was observed on both sides of the resected pseudarthrosis in two cases. Less characteristic enchondral features were noted in three cases. These findings confirm that the pseudarthrosis is due to the failure of coalescence of the two primary ossification centers of the clavicle.

Adolescent↗
PubMed2004

Simple bone cysts of the proximal humerus complicated with growth arrest.

A simple bone cyst of the proximal humeral metaphysis was found to cause growth disturbance with shortening and deformity in four patients. All had one pathological fracture. Three of them were treated with cortisone injections; the fourth patient, who presented an erosion of the physis, was treated with saline solution irrigation. Four hypotheses about the aetiology of growth arrest in the evolution of this benign lesion, are discussed: iatrogenic lesion of the physis, growth plate involvement by fracture, cortisone injection, and increased cyst pressure leading to erosion and even perforation of the growth plate.

Adrenal Cortex Hormones↗
PubMed2003

Prenatal sonographic diagnosis of the congenital dislocated spine: a case report.

STUDY DESIGN: A case of congenital dislocated spine diagnosed by prenatal sonography is reported. OBJECTIVES: To report the first documented case of prenatal diagnosis, to point out the characteristic features of prenatal sonography of congenital dislocation of the spine, and to show the results of a careful management of birth in cases of congenital dislocated spine. SUMMARY OF BACKGROUND DATA: The congenital dislocated spine consists of an anterior defect in formation of the vertebrae with a displaced vertebra and angulation of the neural canal. Instability and the consequent possibility of neurologic damage are the major features of this rare entity. Early intervention is essential to prevent an irreparable neurologic deficit. METHODS: Pre- and postnatal imaging was reviewed. Early postnatal treatment is described. RESULTS: Prenatal diagnosis of the congenital dislocated spine can be detected with sonography and confirmed by radiography and magnetic resonance imaging. CONCLUSIONS: Prenatal diagnosis of the congenital dislocated spine is of the utmost importance for parental counseling and obstetrical management.

Female↗
PubMed2002

Distal fibular reconstruction with pedicled vascularized fibular head graft: a case report.

We present an original technique for reconstruction of the distal fibula after tumor resection. The case report was of a 13-year old boy suffering from an osteogenic sarcoma of the distal fibula. Pedicled vascularized epiphyseal transfer using the ipsilateral proximal fibula was performed. Results were assessed at 2 years and 6 months and provided good stability and normal functional outcome of the ankle.

Adolescent↗