We report multiple synchronous clear-cell chondrosarcomas in a 43-year-old patient. The patient had a lesion in the right proximal humerus and in the left femoral condyle. Bone scintigraphy revealed increased uptake in both foci. Pathological analysis confirmed the diagnosis in both locations. In the proximal humerus, wide resection of the tumour was performed with allograft reconstruction of the joint with osteosynthesis. The femoral condyle was treated with curettage, phenolization, and cementation. Over a follow-up of 10 years no recurrence or metastasis was observed.

<p><strong><em>Introducción:</em></strong><strong> </strong>El objetivo de tratamiento del pie Bot está enfocado en lograr un pie plantígrado, indoloro y  que permita el uso del calzado habitual.</p><p>El objetivo del trabajo fue medir la incidencia de recidiva luego de obtenida la corrección de la deformidad en pacientes con pie bot tratados con tutor de Ilizarov, y  analizar los factores pronósticos asociados.</p><p><strong><em>Material y Método: </em></strong>Cohorte retrospectiva de factores pronóstico. Se trató con este método a 48 pacientes (70 pies) desde 1988. Se excluyeron los pacientes con falta de corrección de la deformidad en el momento de retirar el tutor (deformidad residual o corrección incompleta). La variable de estudio fue la recidiva.</p><p><strong><em>Resultados:</em></strong></p><div class="page" title="Page 1"><div class="layoutArea"><div class="column"><p><span>El 77% de los 70 pies eran idiopáticos. Solo 18 pies no habían sido tratados. Todos eran pacien- tes pediátricos. El promedio de edad en el momento de la cirugía era de 7,9 años. Se incluyeron tres grupos de pacientes: tratados con Ilizarov solo (40,2%), en combi- nación con cirugía de partes blandas (38,5%) y asociado con osteotomías (21,3%). El seguimiento promedio posoperatorio fue de 10,6 años (de 5,5 a 22). En el 71% de los pies, los resultados fueron pobres, la deformidad recidivó en un promedio de 38 meses, y fueron necesarias cirugías complementarias para lograr un pie plantígrado.</span></p></div></div></div><p><strong><em>Conclusi</em></strong><strong><em>ó</em></strong><strong><em>n:</em></strong> Presentamos una importante casuística con seguimiento alejado de pie bot recidivado o inveterado, con una alta recidiva de la deformidad (71%). No encontramos diferencias estadísticamente significativas entre los subgrupos estudiados (edad, diagnóstico, trata- mientos previos y procedimientos asociados).</p><p>Actualmente no consideramos a esta técnica de primera elección, pues nuestros resultados fueron poco alentadores.</p><p> </p><p><strong><em>Palabras clave: Pie Bot Recidivado, Inveterado, Ilizarov.</em></strong></p><p> </p><p> </p><p> </p><p> </p><p><strong>Abstract:</strong></p><p><strong><em>Introduction:</em></strong> The goal of treatment for clubfoot is to achieve a pain-free, plantigrade foot that allows walking comfortably with normal shoes.</p><p>The aim of the study was to assess the relapse rate after having achieved correction of the deformity in patients with clubfoot treated with the Ilizarov method and to analyze associated prognostic factors.</p><p><strong><em>Material and method:</em></strong> In a retrospective cohort study of prognostic factors we evaluated 48 patients, 70 feet, treated with the Ilizarov method between 1988 and 2006.</p><p>Patients in whom correction of the deformity with the external fixator failed (residual deformity or incomplete correction) were excluded from the study. The study variable was relapse.</p><p><strong><em>Results:</em></strong> Etiology was idiopathic in 77% of 70 feet. Only 18 feet had not been treated previously. All patients were children. Mean age at surgery was 7.9 years. The patients were divided into three groups according to the treatment with the Ilizarov fixator alone (40%), in combination with soft-tissue release (38%), or associated with osteotomies (21%).</p><p>Mean post-operative follow-up was 10.6 years (range: 5.5-22 years).</p><p>Outcome was poor in 71% of the feet, which relapsed after a mean of 38 months, requiring additional surgeries to achieve a plantigrade foot.</p><p><strong><em>Summary:</em></strong> The present is a large series of neglected or relapsed clubfeet treated with the Ilizarov method with good initial results, but a high rate of recurrence of the deformity after a long follow-up period (71%). We did not find statistically significant differences among the subgroups comparing age, diagnosis, previous treatments, and associated procedures and no prognostic factors for relapse could be identified.</p><p>Currently, we do not consider the Ilizarov method the technique of choice for the treatment of neglected or relapsed clubfoot as our results were not very promising.</p><p> </p><p><strong><em>Key Words: Ilizarov; Treatment; Recurrence; Neglected Clubfoot.</em></strong></p>