Background: Survival in patients who have Ewing sarcoma is correlated with postchemotherapy response (tumor necrosis). This treatment response has been categorized as the response rate, similar to what has been used in osteosarcoma.There is controversy regarding whether this is appropriate or whether it should be a 60 - Cancer.

This is a case report that includes an analysis about extrapulmonary tuberculosis and his singularities, cause can be confused with cancer. Our patient an 83-year-old woman from Pasto-Colombia presents a mimicking metastasis with melanoma. This guides us to understand that extrapulmonary tuberculosis is a rare pathology, but it should be considered as a potential differential diagnosis of any osteolytic lesion. That is the reasons for to be one of the great imitators in medicine, we come up with are totally necessary in a differential diagnosis with malignancies, a high index of suspicion.

Background and ObjectivesMechanical augmentation with metal implants in the treatment of bone tumors limits magnetic resonance imaging and computerized tomography scan imaging due to the scattering effect. In addition, modulus of elasticity differences may cause chronic pain. We present a surgical technique in which cortical allografts are used as plates. This is a two‐center experience focusing on functional and radiographic outcomes and complications.MethodsUnder IRB approval, we performed a retrospective patient review. Demographics, treatment indications, tumor characteristics, and complications were collected. Radiographic studies were reviewed to determine the time to osseous incorporation. The last follow‐up functional evaluation included the Musculoskeletal Tumor Society (MSTS) score, the Karnofsky scale, and Eastern Cooperative Oncology Group (ECOG).ResultsThirty patients, seventeen female and thirteen male, 16‐year‐old in average were included. The most common diagnoses were the humeral aneurysmal bone cyst and unicameral bone cyst. The Median follow‐up was 6 years. Cortical allograft incorporation median time was 8.8 months whereas allograft void bone incorporation was 3 months. The average time to full weight‐bearing without impact activity was 3.1 months. The most common complication was symptomatic hardware. Other complications included a superficial infection successfully treated with antibiotics, a temporary radial nerve neuropraxia, and an allograft fracture requiring revision surgery. Most patients had an MSTS score higher than 90 (excellent). Patients with malignant tumors had ECOG of 0 and a Karnofsky score of 100.ConclusionBiological osteosynthesis is a bone preserving and effective modality for mechanical augmentation with excellent functional results and low complication rates.

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