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Antiguamente conocida como luxación congénita de la cadera, actualmente se prefiere el término de displasia del desarrollo de la cadera por su carácter evolutivo y de aparición posnatal.

Copyright of Acta Ortopédica Mexicana is the property of Sociedad Mexicana de Ortopedia, AC and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Ortopédica Mexicana is the property of Sociedad Mexicana de Ortopedia, AC and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Ortopédica Mexicana is the property of Sociedad Mexicana de Ortopedia, AC and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Introduction: A metastasis is the tumor cell capacity to migrate from the primary tumor and implant itself in tissues of an organ at a distance by hematogenous, lymphatic or contiguity. The main causes of bone metastases are: breast, prostate and lung cancer. It usually occurs in patients over 50 years of age. There is a predilection for metastasizing to the axial skeleton., Objective: To determine the frequency of tumors that produce bone metastases in our institution., Material and Methods: Observational, cross-sectional, descriptive study, for retrospective analysis of the cases of patients diagnosed with bone metastases., Results: 193 cases; 121 women and 72 men with an age range of 42 to 84 years. Cancers associated with bone metastases were breast, lung, prostate, cervical and renal cancers; to a lesser extent other such as colon, thyroid, liver and skin. The most affected bones were axial skeleton: lumbar and dorsal spine, and in appendicular skeleton the femur in the diaphysiary region and in the humerus the proximal third. At present it has not been possible to improve the effectiveness of timely detection strategies, so bone pain should begin with a protocol of tumor suspicion., Conclusions: More than 80% of the patients came for fracture. All patients had a history of pain greater than 12 months with no prior study protocol.

The developmental dysplasia of the hip (DDH), where the spectrum of deformity varies from a slight mismatch in the articular surfaces between the ilium and femur, which will bring a premature wear of the joint, until the situation more serious when the femoral head is out of the acetabulum, causing a host of disorders side as curvature of the spine, significant shortening of the limb deformities in the knee and the contralateral hip, as well as causing pain and loss of joint mobility mentioned. All this makes the spectrum of abnormalities in a person being disabled with a social and economic burden for the family and society. "Preventing" a clinical entity such as developmental dysplasia of the hip does not mean to anticipate the presentation, because children continue to be born with this problem, but to have a program for early detection and early treatment and thus prevent the occurrence. The goal of this study was to provide the medical community that timely tool for prevention. When diagnosed and treated in a timely and favorable prognosis qualified for motor function and quality of life.

Osteoblastic osteosarcoma is the most frequent malignant bone neoplasia in pediatric patients. It accounts for 50% of primary bone tumors and the most frequent age at presentation is adolescence, particularly during the growth spurts. Cases of children younger than 8 years of age have been reported in the literature. The purpose of this article is to report the case of a male, 19 month-old patient with osteoblastic osteosarcoma of the left distal femur and proximal tibia. It is considered as a special case due both to the age at presentation and to the multicenter feature of the tumor. This suggests that this entity may be more aggressive and rapidly growing in younger children. At the National Pediatrics Institute, in 35 years we only had three cases of children younger than 5 years.

Introduction: The Tc-99m-ciprofloxacin complex, introduced in 1993, has been extensively evaluated all over the world with good results for the diagnosis of active bacterial osteoarticular infections. There are only a few publications on the use of this procedure in pediatric ages. In our study we evaluated the efficacy of the Tc-99m ciprofloxacin scan for the diagnosis of osteoarticular infections in the pediatric population assessing its sensitivity, specificity, and positive and negative predictive value., Material and Methods: A retrospective, descriptive, observational study was done in 94 patients with clinical suspicion of osteoarticular infection in whom a Tc-99m ciprofloxacin bone scan was performed; the diagnosis was confirmed with intraoperative cultures and blood cultures. The results obtained with the Tc-99m ciprofloxacin scan and the culture reports were analyzed, as well as the sensitivity, specificity and the positive and negative predictive values of the Tc-99m ciprofloxacin scan., Results: Among the patients with intraoperative and blood cultures, 80 cases (85.1%) were positive and 14 cases (14.9%) were negative for bone infection. In the Tc-99m ciprofloxacin scan 78 cases (83%) were found to be positive for infection and 16 cases (17%) were negative. There were two false negatives. We found a 97.6% sensitivity and 100% specificity, with a 100% positive predictive value and an 87.5% negative predictive value., Conclusion: The Tc-99m-ciprofloxacin complex is useful to make the differential diagnosis between inflammation and infection in pediatric patients in whom an osteoarticular infectious process is suspected.

Fibrous or desmoid tumors are grouped under the term fibromatosis; there are several groups; the pediatric aggressive form is rare, especially the pelvis and/or hip presentation. This causes a variable degree of destruction of the surrounding tissues. It is a diagnosis by exclusion and histopathologic testing; treatment is always surgical and conservative treatment is indicated only for special locations and/or patient conditions. This article reports a case of aggressive pediatric hip fibromatosis with severe joint destruction, as well as the work-up and management protocol followed at the National Pediatrics Institute Pediatric Orthopedics Service to approach bone tumors. No cases similar to this one have been reported.

Minimally invasive surgery (MIS) in children's forefoot is a technique that permits minimum tissue trauma assisted by fluoroscopic control. We evaluated the results of this modality of surgery in problems such as: claw toes, hallux valgus, exostosis, hammer toe, and bunionectomy. We had a complication for using the procedure with more revolutions per minute (rpm), which remind us of the importance of using 2000-8000 rpm. We found that it is not commendable to make hypercorrections, due it increases they risk of recurrence. MIS is an excellent option in forefoot deformity correction in children leaving minimal scars and preserving the physis.