Alargamiento óseo con clavos magnéticos. Experiencia en pacientes menores de 18 años / Bone lengthening with magnetic nails. Experience in patients younger than 18

Antecedentes y objetivo: El alargamiento óseo con clavos endomedulares magnéticos (CEM) se plantea como alternativa ventajosa a otros alargamientos, al eliminar los inconvenientes de la fijación externa. El objetivo de este trabajo es analizar los resultados y valorar las complicaciones en una serie de pacientes menores de 18 años. Material y métodos: Entre 2014 y 2019 se han realizado 31 alargamientos con CEM tipo Precice2® (23 fémures, 8 tibias), en 28 pacientes menores de 18 años (15 varones y 13 mujeres). Este estudio retrospectivo observacional incluye pacientes con seguimiento de más de 18 meses. La edad media ha sido de 14,4 años (8-18). Los aspectos más relevantes analizados han sido: acortamiento/deformidad previos, alargamiento/corrección conseguidos y tiempo hasta carga completa. Además, se han revisado las complicaciones y reintervenciones. Resultados: El alargamiento conseguido ha sido de 5,5cm de media (3-8). En 28 alargamientos (90,3%) se ha conseguido o superado el objetivo planificado. El índice de curación (IC) medio fue de 1,1 meses/cm. Más de la mitad de los alargamientos (55%) han presentado alguna complicación. Aunque estas solo han dejado secuelas permanentes en 2 pacientes (7,1%), 9 de ellos han precisado reintervención (13 operaciones). No ha habido infecciones. Conclusiones: La elongación ósea con CEM en pacientes menores de 18 años ha conseguido su objetivo en más de un 90% de casos de manera eficaz, precisa y segura. En esta serie, los CEM han eliminado la necesidad de fijadores externos y han tutorizado eficazmente el segmento operado. La alta incidencia de complicaciones sigue siendo preocupante.(AU)

Background and goal: Bone elongation with magnetic endomedullary nails (MEN) has been proposed as an advantageous alternative to other techniques, by eliminating the drawbacks of external fixation. The aim of this work is to analyze the results and assess the complications in a series of patients under the age of 18. Material and methods: From 2014 to 2019, 31 elongations (23 femurs, 8 tibias) using MEN (Precice2™) have been performed in 28 patients younger than 18 (15 males and 13 females). In this observational retrospective study, only patients with follow-up longer than 18 months have been included. The average age has been 14.4 years (8–18). The most relevant aspects analyzed have been: previous shortening/deformity, elongation/correction achieved and time to full weight bearing. Complications and re-interventions have also been assessed. Results: The elongation achieved has been 5.5cm on average (3–8). In 28 elongations (90.3%) the planned goal of lengthening was achieved. The mean healing index was 1.1months/cm. More than half of elongations (55%) presented complications. Although they produced permanent sequelae in only two patients (7.1%), a total of 9 patients required re-intervention (13 operations). No infections were detected. Conclusions: Bone lengthening with MEN in individuals younger than 18 has achieved its goal in more than 90% of patients in an effective, accurate and safe manner. The use of MEN in this series has eliminated the need for external fixators and has successfully tutorized the operated segment. The high number of complications detected in this study remains a concern.(AU)

[Translated article] Bone lengthening with magnetic nails. Experience in patients younger than 18 / Alargamiento óseo con clavos magnéticos. Experiencia en pacientes menores de 18 años

Antecedentes y objetivo: El alargamiento óseo con clavos endomedulares magnéticos (CEM) se plantea como alternativa ventajosa a otros alargamientos, al eliminar los inconvenientes de la fijación externa. El objetivo de este trabajo es analizar los resultados y valorar las complicaciones en una serie de pacientes menores de 18 años. Material y métodos: Entre 2014 y 2019 se han realizado 31 alargamientos con CEM tipo Precice2® (23 fémures, 8 tibias), en 28 pacientes menores de 18 años (15 varones y 13 mujeres). Este estudio retrospectivo observacional incluye pacientes con seguimiento de más de 18 meses. La edad media ha sido de 14,4 años (8-18). Los aspectos más relevantes analizados han sido: acortamiento/deformidad previos, alargamiento/corrección conseguidos y tiempo hasta carga completa. Además, se han revisado las complicaciones y reintervenciones. Resultados: El alargamiento conseguido ha sido de 5,5cm de media (3-8). En 28 alargamientos (90,3%) se ha conseguido o superado el objetivo planificado. El índice de curación (IC) medio fue de 1,1 meses/cm. Más de la mitad de los alargamientos (55%) han presentado alguna complicación. Aunque estas solo han dejado secuelas permanentes en 2 pacientes (7,1%), 9 de ellos han precisado reintervención (13 operaciones). No ha habido infecciones. Conclusiones: La elongación ósea con CEM en pacientes menores de 18 años ha conseguido su objetivo en más de un 90% de casos de manera eficaz, precisa y segura. En esta serie, los CEM han eliminado la necesidad de fijadores externos y han tutorizado eficazmente el segmento operado. La alta incidencia de complicaciones sigue siendo preocupante.(AU)

Background and goal: Bone elongation with magnetic endomedullary nails (MEN) has been proposed as an advantageous alternative to other techniques, by eliminating the drawbacks of external fixation. The aim of this work is to analyze the results and assess the complications in a series of patients under the age of 18. Material and methods: From 2014 to 2019, 31 elongations (23 femurs, 8 tibias) using MEN (Precice2™) have been performed in 28 patients younger than 18 (15 males and 13 females). In this observational retrospective study, only patients with follow-up longer than 18 months have been included. The average age has been 14.4 years (8–18). The most relevant aspects analyzed have been: previous shortening/deformity, elongation/correction achieved and time to full weight bearing. Complications and re-interventions have also been assessed. Results: The elongation achieved has been 5.5cm on average (3–8). In 28 elongations (90.3%) the planned goal of lengthening was achieved. The mean healing index was 1.1months/cm. More than half of elongations (55%) presented complications. Although they produced permanent sequelae in only two patients (7.1%), a total of 9 patients required re-intervention (13 operations). No infections were detected. Conclusions: Bone lengthening with MEN in individuals younger than 18 has achieved its goal in more than 90% of patients in an effective, accurate and safe manner. The use of MEN in this series has eliminated the need for external fixators and has successfully tutorized the operated segment. The high number of complications detected in this study remains a concern.(AU)

[Translated article] Bone lengthening with magnetic nails. Experience in patients younger than 18.

BACKGROUND AND GOAL: Bone elongation with magnetic endomedullary nails (MEN) has been proposed as an advantageous alternative to other techniques, by eliminating the drawbacks of external fixation. The aim of this work is to analyse the results and assess the complications in a series of patients under the age of 18. MATERIAL AND METHODS: From 2014 to 2019, 31 elongations (23 femurs, 8 tibias) using MEN (Precice2®) have been performed in 28 patients younger than 18 (15 males and 13 females). In this observational retrospective study, only patients with follow-up longer than 18 months have been included. The average age has been 14.4 years (8-18). The most relevant aspects analysed have been: previous shortening/deformity, elongation/correction achieved and time to full weight bearing. Complications and re-interventions have also been assessed. RESULTS: The elongation achieved has been 5.5cm on average (3-8). In 28 elongations (90.3%) the planned goal of lengthening was achieved. The mean healing index (HI) was 1.1months/cm. More than half of elongations (55%) presented complications. Although they produced permanent sequelae in only two patients (7.1%), a total of 9 patients required re-intervention (13 operations). No infections were detected. CONCLUSIONS: Bone lengthening with MEN in individuals younger than 18 has achieved its goal in more than 90% of patients in an effective, accurate and safe manner. The use of MEN in this series has eliminated the need for external fixators and has successfully tutorized the operated segment. The high number of complications detected in this study remains a concern.

Bone lengthening with magnetic nails. Experience in patients younger than 18. / Alargamiento óseo con clavos magnéticos. Experiencia en pacientes menores de 18 años.

BACKGROUND AND GOAL: Bone elongation with magnetic endomedullary nails (MEN) has been proposed as an advantageous alternative to other techniques, by eliminating the drawbacks of external fixation. The aim of this work is to analyze the results and assess the complications in a series of patients under the age of 18. MATERIAL AND METHODS: From 2014 to 2019, 31 elongations (23 femurs, 8 tibias) using MEN (Precice2™) have been performed in 28 patients younger than 18 (15 males and 13 females). In this observational retrospective study, only patients with follow-up longer than 18 months have been included. The average age has been 14.4 years (8-18). The most relevant aspects analyzed have been: previous shortening/deformity, elongation/correction achieved and time to full weight bearing. Complications and re-interventions have also been assessed. RESULTS: The elongation achieved has been 5.5cm on average (3-8). In 28 elongations (90.3%) the planned goal of lengthening was achieved. The mean healing index was 1.1months/cm. More than half of elongations (55%) presented complications. Although they produced permanent sequelae in only two patients (7.1%), a total of 9 patients required re-intervention (13 operations). No infections were detected. CONCLUSIONS: Bone lengthening with MEN in individuals younger than 18 has achieved its goal in more than 90% of patients in an effective, accurate and safe manner. The use of MEN in this series has eliminated the need for external fixators and has successfully tutorized the operated segment. The high number of complications detected in this study remains a concern.

Posteromedial tibial deformity: Radiological evolution and treatment of the discrepancy. / Deformidad posteromedial de la tibia: evolución radiológica y tratamiento de la discrepancia.

INTRODUCTION: Postero-medial deformity (DMPT), unlike other congenital forms that affect the tibia, presents a good evolution spontaneously correcting the important misalignments that present at birth based on the classic orthopedic laws of Wolff and Hueter-Volkmann, leaving slight residual angulations and variable limb length discrepancy. MATERIAL AND METHODS: Authors carry out a retrospective review of cases diagnosed with DPMT, the evolution of the tibial angulation and the discrepancy in the length of fourteen patients (11 males and 3 females) followed and treated between the years 2003 and 2018. Seven of these were treated by callus distraction. We have considered: PA and lateral of the tibia and stand-up entire limbs x-ray during age growth, along with the clinical records of the patients. RESULTS: The medial diaphyseal radiological deformity of the newborn or neonatal period was 34° and the final 10°. The posterior deformity evolved from 46° to a final angulation of 11°. The physeal angulation in the initial AP projection was 34° and the end view was 8° and in the lateral projection from 44 to 6°. The mechanical axis of the limb was correcting towards a neutral axis in relation to the aforementioned physeal and diaphyseal correction in all cases except two. In five of the cases, although the mechanical axis was normal-aligned, at the tibial level it ran eccentrically and externally to the tibial cortex. The length relationship between the short tibia and the healthy tibia maintains a constant proportion throughout the growth of 89%, that is, the inhibition of growth is 11%. We observe that 80% of the discrepancy is found in the tibia and that the remaining 20% ??was exposed from the height of the tarsus. Two patients presented a traumatic and accidental diaphyseal fracture of the tibia. The difference in the length of the tibia was compensated to seven patients by callus distraction of 5.4cm using the callotasis method with a Healing Index of 34.5 days/cm. CONCLUSIONS: DPMT improves substantially during the first years of life. Joint alignment of the knee and ankle is achieved before the correction of diaphyseal deformity. The tibia length discrepancy increases with the growth of the child since there is an 11% growth inhibition that will cause a skeletal maturity discrepancy between 4-7cm. Callus distraction before skeletal maturity is the method chosen to compensate this discrepancy.

Femoral osteochondritis of the knee: prognostic value of the mechanical axis.

PURPOSE: Femoral osteochondritis dissecans (OCD) is a disorder of unknown aetiology and variable prognosis that causes knee pain. In this paper, the authors study the impact of lower limb malalignment on the development and prognosis of OCD. METHODS: After anteroposterior (AP) and lateral radiograph and MRI of the knee, 53 cases of OCD were diagnosed. All patients were studied by standing full-length AP radiograph of the lower extremities in order to analyse the relationship between the femorotibial and mechanical axis and the location and stability of the osteochondritis. RESULTS: The OCD lesion was located in the medial condyle (zone 2) in 75.5% of cases (40 cases). The lateral condyle was affected in 24.5% of cases (zone 4 in nine cases and zone 5 in four cases). The femorotibial angle (anatomical axis) was normally aligned in 68% of cases. A valgus deformity was observed in 9.5% of cases and a varus deformity in 22.5%. The mechanical axis of the limb appeared normal in only 32% of cases, with medial deviation in 53%, and lateral deviation in 15% of cases. When the OCD lesion was located in the medial condyle (40 cases), the mechanical axis also crossed the knee through the medial zone in 28 cases. When the OCD lesion was located in the lateral condyle (13 cases), the mechanical axis crossed the knee through zones 1 or 2 in four cases. In stable OCD, the mechanical axis and location of the lesion coincided in 19 of 36 cases (52%), compared with 16 of 17 cases (94%) in unstable OCD. CONCLUSIONS: There is a high correlation between OCD location and lower limb mechanical axis deviation. The convergence of the mechanical axis with the location of the OCD lesion may be considered an associated factor in fragment instability. This convergence is more common in unstable OCD.

Osteomielitis crónica recurrente: un reto diagnóstico y terapéutico / Chronic recurrent osteomyelitis: a diagnostic and therapeutic challenge

Introducción. La osteomielitis crónica recurrente (OCR) es una rara enfermedad caracterizada por lesiones óseas inflamatorias asépticas uni- o multifocales. Objetivo. Valorar características clínicas y la respuesta al tratamiento con AINE de los pacientes con OCR. Materiales y métodos. Cinco niños con OCR valorados de forma retrospectiva por un periodo de 8 años, los cuales fueron diagnosticados basándose en los hallazgos clínicos, analíticos, estudio anatomopatológico de las lesiones y pruebas de imagen. Resultados. El 40% presentó afectación multifocal y el 60% unifocal. El 80% eran del sexo masculino (4/5), la edad media al momento del diagnóstico 13 años (r: 11-15 años), los huesos más frecuentemente afectados fueron la clavícula y la tibia representado el 18,2%, el síntoma más común fue el dolor presentándose en todos los pacientes, la fiebre apareció en el 20% de los casos. Los estudios de imagen como la TAC y la RM fueron eficaces en el 100% y en todos la biopsia objetivó infiltrado linfoplasmocitario. Después de un seguimiento medio de 5,9 años se observó una buena respuesta al tratamiento en el 100%, con una recurrencia media a los 5,25 meses. Conclusiones. Los resultados anodinos de la mayoría de los estudios clínicos para valorar OCR y la similitud en la presentación clínica de esta con muchas patologías infecciosas o tumorales hace que su diagnóstico represente un verdadero reto, por otra parte el tratamiento con AINE puede considerarse una buena opción terapéutica inicial (AU)

Introduction. Chronic recurrent osteomyelitis (CRO) is a rare disease characterised by unifocal or multifocal aseptic inflammatory bony lesions. Objective. To evaluate clinical features and response to treatment with non-steroidal anti-inflammatory drugs in patients with CRO. Materials and methods. A retrospective assessment was conducted on 5 children with OCR over a period of 8 years. They had been diagnosed based on clinical, laboratory findings, histological study of injuries, and imaging test. Results. Multifocal disease was observed in 40% of cases, and unifocal in 60%. The large majority (80%) were male, with a mean age at diagnosis of 13 years (range: 11-15 years). The bones most frequently affected were the clavicle and tibia, representing 18.2%. The most common presenting symptom was pain in all patients, with fever being present in 20% of cases. Imaging studies such as CT and MRI were effective in 100%, and in all cases the biopsy reported a lymphoplasmacytic infiltrate. After a mean follow-up of 5.9 years, there was a good treatment response in 100%, with a mean recurrence at 5.25 months being observed. Conclusions. The anodyne results of most clinical studies to assess CRO, and the similarity in clinical presentation of this with many infectious or tumour diseases makes its diagnosis a real challenge. On the other hand treatment with NSAIDs can be considered a good initial therapeutic option (AU)

Chronic recurrent osteomyelitis: A diagnostic and therapeutic challenge. / Osteomielitis crónica recurrente: un reto diagnóstico y terapéutico.

INTRODUCTION: Chronic recurrent osteomyelitis (CRO) is a rare disease characterised by unifocal or multifocal aseptic inflammatory bony lesions. OBJECTIVE: To evaluate clinical features and response to treatment with non-steroidal anti-inflammatory drugs in patients with CRO. MATERIALS AND METHODS: A retrospective assessment was conducted on 5 children with OCR over a period of 8 years. They had been diagnosed based on clinical, laboratory findings, histological study of injuries, and imaging test. RESULTS: Multifocal disease was observed in 40% of cases, and unifocal in 60%. The large majority (80%) were male, with a mean age at diagnosis of 13 years (range: 11-15 years). The bones most frequently affected were the clavicle and tibia, representing 18.2%. The most common presenting symptom was pain in all patients, with fever being present in 20% of cases. Imaging studies such as CT and MRI were effective in 100%, and in all cases the biopsy reported a lymphoplasmacytic infiltrate. After a mean follow-up of 5.9 years, there was a good treatment response in 100%, with a mean recurrence at 5.25 months being observed. CONCLUSIONS: The anodyne results of most clinical studies to assess CRO, and the similarity in clinical presentation of this with many infectious or tumour diseases makes its diagnosis a real challenge. On the other hand treatment with NSAIDs can be considered a good initial therapeutic option.

Discrepancia de longitud de los miembros inferiores tras canalización arterial en niños / Limb lengh shortening after arterial cannulation in infancy

Objetivos. Conocer la posible asociación entre la realización de canalizaciones arteriales con el desarrollo de discrepancias de longitud en los miembros inferiores y de alteraciones del crecimiento del fémur proximal en la infancia. Material y métodos. Se realiza un estudio retrospectivo de 300 niños que precisaron una canalización arterial y/o un cateterismo cardíaco durante la infancia en relación con la existencia de patología cardiovascular congénita. Durante su seguimiento en la consulta de cardiología pediátrica, a 7 de ellos se les detectó una discrepancia de longitud de los miembros inferiores (MM II) por lo que fueron remitidos a nuestras consultas externas para estudio. Resultados. Los 7 pacientes fueron valorados en nuestra consulta con una media de 10 años de edad. La media de discrepancia de longitud fue de 2,7 cm, más frecuente en el lado derecho a expensas de fémur y tibia. Tres de los pacientes presentaron una deformidad de la extremidad proximal del fémur: 2 casos de caput valgum y uno de apofisiodesis aislada bilateral de trocánter mayor. Todos los niños fueron tratados inicialmente con un alza en el miembro más corto. Uno de ellos precisó un alargamiento tibial y 2 de ellos están a la espera de alargamiento para la compensación de la discrepancia. Conclusión. Es recomendable el seguimiento clínico y radiológico de los pacientes a los que se les haya realizado un cateterismo en su primera infancia por la relación que existe entre estas técnicas y el riesgo de desarrollar una discrepancia de longitud en el miembro inferior (AU)

Objectives. The aim of this study was to assess the relationship between arterial cannulations and the development of limb length discrepancies in childhood or impaired growth of the proximal femur. Material and Methods. A retrospective study was conducted on 300 children who required arterial cannulation and/or cardiac catheterisation during childhood in relation to congenital heart diseases. Seven of these patients were referred from the Paediatric Cardiology clinic due to a limb length discrepancy and/or proximal femoral deformities. Results. Seven children, with a mean age of 10 years, were referred to our clinic. The mean length discrepancy was 2.7 cm, and was more frequent on the right side. Three of the patients presented with proximal femoral deformities: two cases of caput valgum and one of bilateral physeal arrest of the greater trochanter. All children were initially treated with a shoe lift in the shortest limb. One of them required a tibial lengthening and two others are awaiting a similar procedure. Conclusion. We recommend clinical and radiological follow-up of patients who have undergone catheterisation during their infancy due to the relationship between these techniques and the risk of developing a limb length discrepancy (AU)

[LIMB LENGH SHORTENING AFTER ARTERIAL CANNULATION IN INFANCY]. / Discrepancia de longitud de los miembros inferiores tras canalización arterial en niños.

OBJECTIVES: The aim of this study was to assess the relationship between arterial cannulations and the development of limb length discrepancies in childhood or impaired growth of the proximal femur. MATERIAL AND METHODS: A retrospective study was conducted on 300 children who required arterial cannulation and/or cardiac catheterisation during childhood in relation to congenital heart diseases. Seven of these patients were referred from the Paediatric Cardiology clinic due to a limb length discrepancy and/or proximal femoral deformities. RESULTS: Seven children, with a mean age of 10 years, were referred to our clinic. The mean length discrepancy was 2.7cm, and was more frequent on the right side. Three of the patients presented with proximal femoral deformities: two cases of caput valgum and one of bilateral physeal arrest of the greater trochanter. All children were initially treated with a shoe lift in the shortest limb. One of them required a tibial lengthening and two others are awaiting a similar procedure. CONCLUSION: We recommend clinical and radiological follow-up of patients who have undergone catheterisation during their infancy due to the relationship between these techniques and the risk of developing a limb length discrepancy.

Osteochondromas in fibrodysplasia ossificans progressiva: a widespread trait with a streaking but overlooked appearance when arising at femoral bone end.

Metaphyseal bony outgrowths are a well-recognized feature of fibrodysplasia ossificans progressiva (FOP) phenotype, but its genuine frequency, topographic distribution, morphological aspect, and potential implications are not fully established. To better ascertain the frequency and characteristics of osteocartilaginous exostoses in FOP disease, we conducted a cross-sectional radiological study based on all the traceable cases identified in a previous comprehensive national research. Metaphyseal exostoses were present in all the 17 cases of FOP studied. Although most often arising from the distal femoral (where metaphyseal exostoses adopt a peculiar not yet reported appearance) and proximal tibial bones, we have found that they are not restricted to these areas, but rather can be seen scattered at a variety of other skeletal sites. Using nuclear magnetic resonance imaging, we show that these exophytic outgrowths are true osteochondromas. As a whole, these results are in agreement with data coming from the literature review. Our study confirms the presence of metaphyseal osteochondromas as a very frequent trait of FOP phenotype and an outstanding feature of its anomalous skeletal developmental component. In line with recent evidences, this might imply that dysregulation of BMP signaling, in addition to promoting exuberant heterotopic ossification, could induce aberrant chondrogenesis and osteochondroma formation. Unveiling the molecular links between these physiopathological pathways could help to illuminate the mechanisms that govern bone morphogenesis.

[Early reconstruction of congenital pseudoarthrosis of the tibia with free vascularized fibular grafts]. / Reconstrucción precoz de pseudoartrosis congénita de tibia con injerto libre vascularizado de peroné.

Congenital pseudoarthrosis of the tibia (CPT) is an uncommon disease presenting a tibial nonunion since birth and frequently associated to neurofibromatosis type 1. Surgical management by wide excision of the pseudoarthrosis and sustitution of the defect with vascularized bone in an early stage has proven to be the most effective technique in terms of bone consolidation. We present a clinical case of a 22-month-old patient with CPT treated successfully by reconstruction with a free vascularized fibula graft with an excellent functional result.

Enfermedad de Sinding-Larsen-Johansson: análisis de factores asociados / Sinding-Larsen-Johansson disease: analysis of the associated factors

Objetivo. Analizar los factores clínicos, etiológicos biomecánicos asociados a la enfermedad de Sinding-Larsen-Johansson (SLJ). Material y método. Estudio de casos-control valorando los siguientes parámetros: edad, sexo, tiempo de evolución clínica, lateralidad, nivel de actividad deportiva, grado radiológico, existencia de patela alta, existencia de retracción de isquiotibiales y aumento de la caída posterior de la tibia. Resultados. Presentamos 15 rodillas en 14 pacientes (un caso de afectación bilateral). El porcentaje de varones es del 85,7% y la edad media de afectación es de 10,86 años (d.t. 1,61). Todos ellos presentaban un nivel de actividad física y deportiva elevado con una duración de los síntomas muy variable (1-36 meses). Sin tendencia clara en cuanto a la lateralidad, la mayoría se incluyen en un grado radiológico tipo ii (53,3%). El análisis de los datos no muestra diferencias significativas (p>0,05) entre los grupos respecto al índice de Caton ni de Insall modificado. En la medición del ángulo poplíteo en las rodillas lesionadas, sí encontramos diferencias significativas (media: 32,50 d.t.:8,90) con respecto al grupo control (17,67; 8,21). La diferencia en la medición del ángulo de caída posterior en las rodillas lesionadas también ha resultado estadísticamente significativo (10,47; 2,82) con respecto a las rodillas de los casos control (8,33; 1,40). Conclusiones. Los pacientes con la enfermedad tienen un aumento de la pendiente tibial y retracción de isquiotibiales respecto al grupo control y esta diferencia es estadísticamente significativa (AU)

Aim. To analyse the clinical symptoms, aetiology and biomechanical aspects related to Sinding-Larsen-Johansson (SLJ) disease. Material and method. A case control study was conducted, analysing the following variables: age, gender, clinical follow up, side of body with the symptoms, sporting activity, radiological stage, presence of patella alta, presence of short hamstring tendons, and increased posterior tibial slope. Results. A total of 15 knees in 14 patients were studied; one case with bilateral disease. The large majority of cases were 85.7% were male, and the mean age was 10.86 (standard deviation 1.61). All of them practised sport and physical activity at a high level with a variable duration of symptoms (1-36 months). There was predominance in side. The majority were radiological grade II (53.3). The data analysis did not show any significant difference (P>.05) between the study groups regarding the Caton and modified Insall indexes. There was a significant difference in the popliteal angle measured in the affected knees (mean: 32.50, SD: 8.9) compared with the control group (mean: 17.67, SD: 8.21). The difference in the posterior slope angle in the affected knees was also statistically significant (mean: 10.47, SD: 2.82) compared with the control (mean: 8.33, SD: 1.4). Conclusions. According to our data, patients have short hamstring tendons and increased posterior tibial slope compared to the control group, and this difference is statistically significant (AU)

Reconstrucción precoz de pseudoartrosis congénita de tibia con injerto libre vascularizado de peroné / Early reconstruction of congenital pseudoarthrosis of the tibia with free vascularized fibular grafts

La pseudoartrosis congénita de tibia (PCT) es una enfermedad rara consistente en un tipo específico de falta de unión presente desde el nacimiento asociada frecuentemente a neurofi bromatosis tipo 1. En el manejo quirúrgico es la resección amplia del foco de pseudoartrosis y sustitución del defecto con tejido óseo vascularizado que, realizado de manera precoz, ha demostrado ser la técnica más efectiva en términos de consolidación ósea. Presentamos un caso clínico de un paciente de 22 meses de edad con PCT que fue tratado con éxito mediante reconstrucción con injerto libre vascularizado de peroné, presentando un excelente resultado funcional (AU)

Congenital pseudoarthrosis of the tibia (CPT) is an uncommon disease presenting a tibial nonunion since birth and frequently associated to neurofi bromatosis type 1. Surgical management by wide excision of the pseudoarthrosis and sustitution of the defect with vascularized bone in an early stage has proven to be the most effective technique in terms of bone consolidation. We present a clinical case of a 22-month-old patient with CPT treated successfully by reconstruction with a free vascularized fibula graft with an excellent functional result (AU)

[Sinding-Larsen-Johansson disease: analysis of the associated factors]. / Enfermedad de Sinding-Larsen-Johansson: análisis de factores asociados.

AIM: To analyse the clinical symptoms, aetiology and biomechanical aspects related to Sinding-Larsen-Johansson (SLJ) disease. MATERIAL AND METHOD: A case control study was conducted, analysing the following variables: age, gender, clinical follow up, side of body with the symptoms, sporting activity, radiological stage, presence of patella alta, presence of short hamstring tendons, and increased posterior tibial slope. RESULTS: A total of 15 knees in 14 patients were studied; one case with bilateral disease. The large majority of cases were 85.7% were male, and the mean age was 10.86 (standard deviation 1.61). All of them practised sport and physical activity at a high level with a variable duration of symptoms (1-36 months). There was predominance in side. The majority were radiological grade II (53.3). The data analysis did not show any significant difference (P>.05) between the study groups regarding the Caton and modified Insall indexes. There was a significant difference in the popliteal angle measured in the affected knees (mean: 32.50, SD: 8.9) compared with the control group (mean: 17.67, SD: 8.21). The difference in the posterior slope angle in the affected knees was also statistically significant (mean: 10.47, SD: 2.82) compared with the control (mean: 8.33, SD: 1.4). CONCLUSIONS: According to our data, patients have short hamstring tendons and increased posterior tibial slope compared to the control group, and this difference is statistically significant.

Deformidad en varo del tobillo del niño: corrección mediante fijación externa / Varus deformity of the ankle in a child: correction using external fixation

Introducción y objetivo. La deformidad en varo del tobillo durante la infancia es una secuela no infrecuente tras una epifisiolisis de tibia distal o una infección de esta zona durante la infancia. Los autores revisan los casos tratados mediante fijación externa. Material y métodos. Se revisaron de forma retrospectiva 14 casos de tobillo varo estudiados clínica y radiológicamente mediante telerradiografía anteroposterior de EEII en bipedestación y tratados mediante fijación externa monolateral. Se analizó la causa de la deformidad, su magnitud, procedimiento empleado, complicaciones y cierre precoz de fisis tras el tratamiento. Resultados. Se revisaron retrospectivamente todos los casos de tobillo varo, siendo las causas más frecuentes de deformidad en varo del tobillo durante la infancia: las epifisiolisis de la porción medial de la tibia distal (lesiones SH II, III o IV), infección de tibia distal y sepsis. Hubo dos casos de epifisiolisis tipo II, tres de tipo III y tres de tipo IV. Los métodos de corrección empleados fueron en cuatro casos la distracción fisaria cuando había fisis abierta o la osteotomía metafisaria distal y callotasis posterior en ocho casos. En dos se realizó la corrección de forma aguda asociando otro método de tratamiento para corregir una discrepancia concomitante. En todas las callotasis se realizó osteotomía del peroné, fijándolo con aguja de Kirschner excepto en tres casos. Las complicaciones más frecuentes fueron infecciones alrededor de los tornillos y desplazamiento ad-latum. Discusión y conclusiones. En esta serie se han obtenido buenos resultados en el tratamiento de la deformidad en varo del tobillo del niño mediante la condrodiastasis, la osteotomía y la callotasis. La distracción fisaria antes de alcanzar la madurez esquelética puede ser el método de elección. Si se realiza precozmente es presumible el cierre precoz del resto de fisis fértil. Si el tratamiento es hemicallotasis es recomendable además de la osteotomía del peroné su fijación intramedular con aguja de Kirschner (AU)

Introduction and objective. Varus deformity of the ankle during infancy is a not uncommon after effect after epiphysiolysis of the distal tibial or an infection in this area during childhood. The authors review the cases treated using external fixation. Material and methods. A retrospective review was made of 14 cases of varus ankle clinically and radiologically studied using lower limb antero-posterior teleradiography in the standing position and treated using monolateral external fixation. The cause of the deformity, its magnitude, procedure employed, complications, and premature physeal closure after treatment. Results. All cases of varus ankle were retrospectively reviewed, with the most frequent cause of the deformity in ankle varus during infancy being epiphysiolysis of the middle portion of the distal tibia (SH II, III or IV lesions), distal tibia infection or sepsis. There were two cases of epiphysiolysis type II, three of type III, and three of type IV. The methods of correction employed were, physeal distraction when the physis was open in four cases, and distal metaphyseal osteotomy and subsequent callus distraction in eight cases. In two cases correction was performed acutely combining another treatment method to correct a concomitant discrepancy. The callotasis was performed on all of them using fibular osteotomy, fixing it with a Kirschner wire, except in three cases. The most frequent complications were infections around the screws and ad-latum displacement. Discussion and conclusions. Good results have been obtained in this series of varus deformity of the ankle in the child by means of physeal distraction, osteotomy and callotasis. Physeal distraction before reaching skeletal maturity may be the method of choice. If it is performed earlier the premature closure of the rest of the fertile physis is likely. If the treatment is hemicallotasis, besides the fibular osteotomy, intramedullary fixation with a Kirschner wire is also recommended (AU)

Fracturas diafisarias del fémur en el niño: actualización en el tratamiento / Diaphyseal femur fractures in children. Treatment update

El tratamiento de las fracturas de la diáfisis del fémur en el niño, está sometido a una gran controversia, debido a que los procedimientos que se emplean en los adultos no son aplicables durante el período de crecimiento. No obstante, parece que existe un cierto consenso en que el método que elijamos debe ir encaminado a acortar el tiempo de estancia hospitalaria, que sea confortable para el paciente, que proporcione una adecuada estabilidad a la fractura y origine en menor número de complicaciones y secuelas. Parece existir cierta unanimidad en que en menores de 5 años los métodos conservadores (arnés de Pavlik, yeso precoz,...) son los métodos de elección salvo en situaciones complejas. Es a partir de los 6 años y hasta los 13 años, el período en el cual la indicación de un método u otro puede estar más en discusión, si bien hoy en día el enclavado intramedular elástico es el método de predilección por parte de la mayoría de los autores, sobre todo para fracturas transversales y que asientan en el tercio medio, excepto en casos de gran inestabilidad. En estas situaciones de fracturas conminutas o con trazos oblícuos, la fijación externa monolateral, los clavos rígidos introducidos desde la región trocantérica y las placas atornilladas percutáneas submuscular pueden ser una buena opción. En la actualidad no existe un método que pueda aplicarse a la totalidad de los diferentes tipos de fractura. La opción terapéutica elegida deberá basarse en la estabilidad clínica del paciente, características de la fractura, diámetro de la cavidad medular y peso del paciente (AU)

The treatment of diaphyseal femur fractures in children is a subject of great controversy due to the procedures employed in adults not being applicable during the growth period. However, there appears to be some consensus in that the method we choose must lead to shortening the hospital stay, is comfortable for the patient, provides suitable stability to the fracture and has less complications and after effects. There is some unanimity in that the methods of choice should be conservative in children less than 5 years-old (Pavlik harness, early cast), except in complex situations. It is from 6 years to 13 years, the period in which one method or the other that should be discussed more. Nowadays, elastic intramedullary nailing is the method preferred by many authors, particularly for transverse fractures and those located in the middle third, except in cases of great instability. In these situations of comminuted or oblique fractures with monolateral external fixation, the rigid nails introduced from the trochanteric region and percutaneous plating can be a good option. There is currently no method that could be applied to all the different types of fracture. The chosen therapeutic option should be based on the clinical stability of the patient, the characteristics of the fracture, diameter of the medullary cavity and weight of the patient (AU)

Polectomía abierta frente a percutánea en la tenosinovitis estenosante del pulgar infantil / Open versus percutaneous surgery for trigger thumb in children

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