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The high thermal sensitivity of the cancerigenic cells has lead to use hyperthermia to sensitive and eradicate them with efficiency and effectiveness. The traditional procedure for malignant bone tumors is mainly amputation, affecting the life quality of children and adolescents. Hydro hyperthermia has been chosen to improve the prognoses in the extirpation and eradication of the malignant tumors in the Departamento de Tumores Óseos at Instituto Nacional de Rehabilitación. In this paper, it is showed the design, manufacture and operation of a system to generate, control and deliver heat energy into tumor: "Controlled Hydro Hyperthermia". As well as, Bone Temperature Distribution. The system is cheap, easy, affordable and secure system that represents a chance to preserve the extremity without to use any surgical appliance. The system has three parts: The first is the electromechanical device that provides temperature above 80 °C, last 30 min minimum. Second, the direct steam applicator. And finally the thermal mapping. At the moment, 19 patients, with bone tumor and pseudotumor in extremities, have been submitted to hydro hyperthermia procedure. 85.7% patients with osteosarcoma have had good prognostic and the hydro hyperthermia system has not any problem. [ABSTRACT FROM AUTHOR]

Introduction: This work presents clinical evolution and functional outcome of patients with histologic diagnosis of Muscle-aponeurotic aggressive fibromatosis in 10 years of follow up in the National Rehabilitation Institute. Material and methods: We performed a descriptive, retrospective, cross sectioned clinical trial in the Bone Tumour Department. We reviewed the clinical and radiological files from 1996 to 2006. Inclusion criteria: both genres, any age, clinical and histological diagnosis. Exclusion criteria: incomplete file, lost to follow up, other diagnosis. Elimination criteria: Death during trial period. Analyzed variables. Age, genre, occupation, birth place, school degree, anatomic situation, signs and symptoms, time of follow up, treatment, relapses. We used statistical computed system Excel 2007, with central trend descriptive variables. Results: Eleven patients (mean age 24.36; SD 18.32, 1-61 years), 9 female (81.8%) 2 male; birth place: Mexico City 7 (63.63%), Puebla 1, Toluca 1, South Baja California 1 and Chiapas 1. Anatomic situation: Pelvis 6 (54.54%), thoracic and gluteus 3. Pain and presence of a mass 10 (90.9%), range of motion limitation 5, edema and erithema 1. Relapses 6 (55%). Treatment: broad resection 3 patients, marginal resection 6 patients, radical resection 2 patients. Conclusions: If clinical suspicion of Muscle-aponeurotic fibromatosis appears, one should start protocol work up: laboratory, radiographic assessment, nuclear medicine, biopsy and histologic and immune-histochemistry. One should perform broad resections aiming to preserve the most possible extremity tissue disease free. [ABSTRACT FROM AUTHOR]

The need in resolving massive bone losses in hip region caused by tumors, infections, trauma or failed arthroplasties in 17 years of the Bone Tumors Department of the National Rehabilitation Institute, Mexico City, and data obtained from different studies: 1) Biomechanic study of an unconventional hip arthroplasty system, 2) Tridimensional model of a human femur by the finite element method, 3) Biomechanical analysis of a system bone-implant for reconstruction of the proximal third of the femur by the finite element method, 4) Incidence of tumor and pseudotumor bone and soft tissue lesions of the hip, generated the project of designing an unconventional interlocked hip arthroplasty system for femur reconstruction. Two processes were done for adequate manufacturing and dimensioning: Anthropomorphometric study of Mexican femora; 2) Design of an unconventional hip arthroplasty system with the following characteristics: first, the arthroplasty system is constituted by an intramedullar stem, is fixated to femur with interlocking screws, this fixation method was inspired from the design of intramedullar nails of Dr. Fernando Colchero Rosas. The system has a second fixation system in the femur cut region, resolved by a fenestrated support introduced in the cortical wall. Once data was processed, the need for manufacturing 2 models was determined: 1) One for the proximal 11 cm of the femur and 2) other for the 12 distal cm. The height of interlocking screws, 2 models of intracortical proximal support (one fixated and one fixable with an expansible screw), were designed. Diameter, length of the stems, size of spacers and supports were determined for adequate interlocking fixation. We designed the instruments for assembling, impaction and orientation of the arthroplasty system. The system was presented to the Mexican Institute of Industrial Property, at March 15, 1996 and the patent was conceded April 19, 2007 (#245717). [ABSTRACT FROM AUTHOR]

The purpose of this paper is to present the orthopedic-oncologic and functional outcomes of internal partial hemipelvectomy for a secondary giant pelvic chondrosarcoma in a patient with multiple hereditary osteochondromatosis. [ABSTRACT FROM AUTHOR]

Design: Report of cases. Objective: Review of the cases in a period of 10 years with bone and soft tumors in foot and ankle, to knowing epidemilogical, clinic and patologic anatomy parameters to describe the behavior. Materials and methods: Review of 166 cases from 1991 to 2000 and been analyze with descriptive statistic, association measurment for inside stratum, with odds ratio, hipótesis test whith chi square for qualitative date and t to Student for quantitative date. Results:166 patients within 2 years to 78 years old, 81 with bone tumors and 79 with soft tumors, mostly benign, the most frequent was in the soft tissue ganglion and oseal benign exostosis in bone, 6 different malignant tumors, the principal affected zone were the toes, as a difference to literature, the most affected age group was 10 to 20 years followed to the 30 to 40 years old, we report 42 different patological diagnostics results to soft tissue and osseous tissue. Conclusion: clinical features is not a useful parameter to differentiate between malign or benign tumors and does not allow to establish the biological behavior, we propose the diagnostic algorithm that includes the intentional clinical probe, comparative X-ray in three projections with soft technique, in suspicion to malignant lesion may require CT scan, MRI, osseous scan and finally biopsy which will improve the final outcome. [ABSTRACT FROM AUTHOR]

Fibromatosis that involves locally aggressive lesions with a common histology may invade neurovascular structures. Surgical treatment depends on the location. Extensive dissection is the treatment of choice for small and anatomically accessible lesions. Radical surgery is indicated for recurrence, large tumors and tumors that involve neurovascular structures. Material and methods. Case report and literature review. The purpose of this paper is to show a surgical treatment modality emphasizing the reconstructive aspects of the foot of a patient with fibromatosis. Radical surgery was considered at the beginning because the imaging tests showed an apparently inoperable tumor. A conservative procedure was planned and performed; the four-year follow-up is reported. Results. Twenty-six year-old female patient who underwent conservative left foot surgery for aggressive musculoaponeurotic fibromatosis; she also had contralateral developmental hip dysplasia. The 4-year follow-up reported no tumor activity and appropriate gait. Conclusions. The imaging showed an apparently inoperable tumor. However, the careful surgical exploration performed in agreement with the oncologic criteria led to a conservative surgery with a tumor-free bed. Although the vascular supply of the foot may be compromised by the tumor, the foot may develop collateral blood flow that may allow conservative surgery with the integration of the bone graft. Reconstruction of the midfoot with an autologous graft is possible and results in an anatomical foot that biomechanically permits ambulation. [ABSTRACT FROM AUTHOR]

Introduction: This work presents clinical evolution and functional outcome of patients with histologic diagnosis of Muscle-aponeurotic aggressive fibromatosis in 10 years of follow up in the National Rehabilitation Institute., Material and Methods: We performed a descriptive, retrospective, cross sectioned clinical trial in the Bone Tumour Department. We reviewed the clinical and radiological files from 1996 to 2006., Inclusion Criteria: both genres, any age, clinical and histological diagnosis., Exclusion Criteria: incomplete file, lost to follow up, other diagnosis. Elimination criteria: Death during trial period. Analyzed variables. Age, genre, occupation, birth place, school degree, anatomic situation, signs and symptoms, time of follow up, treatment, relapses. We used statistical computed system Excel 2007, with central trend descriptive variables., Results: Eleven patients (mean age 24.36; SD 18.32, 1-61 years), 9 female (81.8%) 2 male; birth place: Mexico City 7 (63.63%), Puebla 1, Toluca 1, South Baja California 1 and Chiapas 1. Anatomic situation: Pelvis 6 (54.54%), thoracic and gluteus 3. Pain and presence of a mass 10 (90.9%), range of motion limitation 5, edema and erithema 1. Relapses 6 (55%)., Treatment: broad resection 3 patients, marginal resection 6 patients, radical resection 2 patients., Conclusions: If clinical suspicion of Muscle-aponeurotic fibromatosis appears, one should start protocol work up: laboratory, radiographic assessment, nuclear medicine, biopsy and histologic and immune-histochemistry. One should perform broad resections aiming to preserve the most possible extremity tissue disease free.

The need in resolving massive bone losses in hip region caused by tumors, infections, trauma or failed arthroplasties in 17 years of the Bone Tumors Department of the National Rehabilitation Institute, Mexico City, and data obtained from different studies: 1) Biomechanic study of an unconventional hip arthroplasty system, 2) Tridimensional model of a human femur by the finite element method, 3) Biomechanical analysis of a system bone-implant for reconstruction of the proximal third of the femur by the finite element method, 4) Incidence of tumor and pseudotumor bone and soft tissue lesions of the hip, generated the project of designing an unconventional interlocked hip arthroplasty system for femur reconstruction. Two processes were done for adequate manufacturing and dimensioning: Anthropomorphometric study of Mexican femora; 2) Design of an unconventional hip arthroplasty system with the following characteristics: first, the arthroplasty system is constituted by an intramedullar stem, is fixated to femur with interlocking screws, this fixation method was inspired from the design of intramedullar nails of Dr. Fernando Colchero Rosas. The system has a second fixation system in the femur cut region, resolved by a fenestrated support introduced in the cortical wall. Once data was processed, the need for manufacturing 2 models was determined: 1) One for the proximal 11 cm of the femur and 2) other for the 12 distal cm. The height of interlocking screws, 2 models of intracortical proximal support (one fixated and one fixable with an expansible screw), were designed. Diameter, length of the stems, size of spacers and supports were determined for adequate interlocking fixation. We designed the instruments for assembling, impaction and orientation of the arthroplasty system. The system was presented to the Mexican Institute of Industrial Property, at March 15, 1996 and the patent was conceded April 19, 2007 (#245717).