Publications by authors named "Pierre Yves Zambelli"

Article Synopsis
  • A study compared two surgical techniques for fixing highly displaced proximal humeral fractures in children: the standard double flexible retrograde nail technique and a modified single nail technique aimed at reducing operation time.
  • The results showed that the single nail technique significantly shortened the initial surgical duration while maintaining similar functional outcomes and complications rates in both groups.
  • Both techniques resulted in effective healing within six weeks, with no major complications reported, although the single nail group had one case of secondary displacement that did not require further surgery.
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Introduction: Circumscribed or pseudomalignant myositis ossificans (MO) is a rare and benign condition characterized by heterotopic bone formation in soft tissues. The clinical presentation of MO, imaging investigations, histological findings, and treatment strategies are unclear, especially in the pediatric population.

Materials And Methods: A literature search was conducted in PubMed, Scopus, and Google Scholar electronic databases to identify original articles and reviews in English or French of traumatic and non-traumatic MO.

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Article Synopsis
  • * This study examined how recombinant insulin-like growth factor 1 (rIGF-1) combined with fibrin microbeads (FibIGF1) could enhance cartilage regeneration by promoting better cellular responses.
  • * Results showed that FibIGF1 led to improved quality and integration of cartilage repair in goat knee models, suggesting its potential as an effective clinical option for treating cartilage injuries.
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Background: Failure of open reduction of developmental hip dislocation is a serious complication and revision surgery appear to be technically demanding with high complication rates. Little attention has been given in literature to patients in whom open reduction of developmental hip dislocation has failed. We present a systematic review about current perspectives and timing when to perform surgical revision after failed open reduction of developmental hip dislocation in children.

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Background: Total hip arthroplasty (THA) in adolescent and young adults represent only about 10% of all THAs. Despite the advances in hip conservation surgery, there are still adolescents and young adults who progress to severe joint degeneration. THA seems to be the last solution in these cases.

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Intramedullary lengthening nails for lower limb reconstruction in children are a rapidly growing field and represent an alternative to external fixators. Today, two types of intramedullary lengthening nails are used: motorized (FITBONE) and magnetically driven (PRECISE) bone lengthening nails. Indications for limb lengthening nails are: 1) Significant lower limb length discrepancy; 2) Short stature and deformities due to musculoskeletal or dysplastic syndromes; 3) Constitutional short stature.

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Background: Orthopedic surgeons often use the intra-articular white blood counts (WBCs) and the percentage of polymorphonuclear cells (PMN) in the diagnosis of an acute swollen and painful knee joint in children. Today, there is no established threshold for the synovial WBC, and their differentiation, as indicative of native joint knee bacterial arthritis. We determine the sensitivity and specificity of synovial WBCs and PMN percentages in the prediction of a community-acquired, acute bacterial native joint septic arthritis (SA) in the pediatric population.

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Background: The Tübingen splint was initially developed for the treatment of stable developmental hip dysplasia (DDH). Later on, some authors expanded its include for the treatment of unstable DDH, but there remain some controversies in the literature. This study aims to compare the outcome between stable and unstable DDH treated with a Tübingen splint.

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Article Synopsis
  • The study investigates the rate of positive findings from finger X-rays in pediatric patients with suspected fractures at a trauma center.
  • Out of 478 reviewed finger injuries, 33.5% showed fractures, primarily affecting adolescents aged 11-16, with only 3.8% requiring surgical treatment.
  • The authors suggest re-evaluating the need for X-rays and developing clinical decision rules to reduce radiation exposure, waiting times, and costs.
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Nowadays, is considered an important cause of primary spinal infections in children aged between 6 and 48 months. The presentation of the disease is often characterized by mild clinical features and a moderate biological inflammatory response, requiring a high index of suspicion. Performing magnetic resonance imaging (MRI) and obtaining an oropharyngeal specimen and subjecting it to a -specific nucleic acid amplification test are recommended for its diagnosis.

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Article Synopsis
  • Displaced proximal humeral fractures in older children, who have low potential for bone remodeling, require stabilization, which can be done using various techniques, including the modified single retrograde nail technique, as this study explores.
  • A retrospective study was conducted on 21 children, using a prebent retrograde nail for fracture management, with data on demographics, surgical time, and outcomes collected over a follow-up period.
  • Results showed that the single intramedullary nail technique had an average surgical time of 49 minutes, achieved satisfactory fracture reductions without complications, and included a follow-up assessment of shoulder range of motion and quality of life via QuickDASH.
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Introduction: Early diagnosis and early treatment have become the gold standard for management of developmental dysplasia of the hip. Surgery is required in case of failed initial treatment. Innominate pelvic osteotomy of Salter (SIO), Pemberton's pericapsular osteotomy (PPO) and Dega's acetabuloplasty (DA) are among the most used procedures.

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Purpose: About 20% of all fractures in children occur at the lower extremity. This study aims to investigate the epidemiology and injury pattern of lower extremity fractures within the pediatric population consulting a tertiary referral hospital in Switzerland.

Methods: Study population included all patients up to 16 years presenting with a lower extremity fracture over a period of one year.

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Objective: Fractures in children are common and account for 10% to 25% of injuries in children with considerable effects on activity restriction and subsequent high socioeconomically impact. Eighty percent of all fractures in children occur at the upper extremity. The article investigates the epidemiology and fracture pattern of the upper extremity within a pediatric population consulting a tertiary referral hospital in Switzerland.

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Purpose: In case of residual hip dysplasia (RHD) in children, pelvic radiographs are sometimes insufficient to precisely evaluate the entire coverage of the femoral head, when trying to decide on the need for further reconstructive procedures.

Methods: This study retrospectively compares the bony and the cartilaginous acetabular angle of Hilgenreiner (HTE) of 60 paediatric hips on pelvic MRI separated in two groups. Group 1 included 31 hips with RHD defined by a bony HTE > 20°.

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Due to frequent movements involving extreme hip amplitudes, ballet dancers often present with hip pain and chondrolabral lesions as seen in femoroacetabular impingement. The lesions appear even with normal anatomy. Diagnosis is often delayed, and treatment is challenging, especially in skeletally immature patients.

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We describe here a rare case of septic pseudarthrosis due to Erysipelatoclostridium ramosum in a female young patient. The patient, currently in remission from Ewing's sarcoma treated by a bone resection and allograft combined with chemotherapy, suffered from a chronic femoral pseudarthrosis in a context of bone insufficiency and graft resorption. A broad range 16S PCR followed by sequencing, as well as an enrichment culture of a bone biopsy revealed the presence of E.

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Aims Of The Study: Paediatric musculoskeletal infections by Panton-Valentine leucocidin (PVL)-producing Staphylococcus aureus constitute a rare, but highly critical event. They are characterised by a rapid course of marked inflammation, worsening under conservative therapy and a high rate of recurrence. This study aimed to illustrate the importance of paediatric PVL-producing S.

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Perthes's disease corresponds to an interruption of the vascularization of the epiphyseal nucleus of the femoral head followed by avascular necrosis. This necrosis weakens the bone and subchondral fractures associated with a deformation of the femoral head is seen. It is important not to miss an extrusion of the femoral head, which makes surgical treatment unavoidable.

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Rationale: Heptadactylia is a rare congenital disorder from the polydactyly family. Polydactyly is generally classified into 3 major groups: preaxial (medial ray), postaxial (lateral ray), and central polydactyly. Most common cases are related to preaxial or postaxial polydactyly.

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The rapid growth of the spine during the pubertal spurt requires greater vigilance for the pediatrician at the annual check during this period to detect the occurrence of scoliosis. Before confirming the diagnosis of idiopathic scoliosis, it is imperative to exclude a secondary cause with appropriate history and clinical examination, and in selective cases with additional testing. Any scoliosis detected during growth should be considered potentially progressive and sent to a specialist if it is equal to or exceeds 20° on the X-rays.

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Rationale: Obturator pyomyositis is a rare condition in children. Diagnosis is often delayed because of its rarity, and the vagaries of its presentation cause it to be easily be missed. Physicians should therefore familiarize themselves with this condition and consider it as a possible differential diagnosis in patients presenting with an acutely painful hip.

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Osteoblastoma is a rare, benign, osteoid-producing, and slow-growing primary bone tumor, typically arising in long bones or in the spine, with a slight male predominance. This report describes the surgical treatment of a giant C-1 (atlantal) osteoblastoma diagnosed in a young male patient with neurofibromatosis Type 1. The authors describe the clinical presentation, the surgical procedure for complete excision and stabilization, and results as of the 1-year follow-up.

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Osteogenesis imperfecta is an inherited connective tissue disorder with wide phenotypic and molecular heterogeneity. A common issue associated with the molecular abnormality is a disturbance in bone matrix synthesis and homeostasis inducing bone fragility. In very early life, this can lead to multiple fractures and progressive bone deformities, including long bone bowing and scoliosis.

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