Three Metachronous Osteosarcomas within 22 Years without Pulmonary Metastases: A Case Report and Review of the Literature

Introduction.We present the extremely rare case of a patient with three metachronous osteosarcomas within 22 years without evident pulmonary manifestation of disease 30 years after first diagnosis.Case Presentation.In 1983, a high-grade osteosarcoma of the left distal femur was diagnosed in an 18-year-old Caucasian male.He received rotationplasty a

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Giant Cell Tumor of Bone: Documented Progression over 4 Years from Its Origin at the Metaphysis to the Articular Surface

The exact location of origin for giant cell tumors of bone (GCTB) remains controversial, as lesions are not routinely imaged early but rather late when the tumor is large and clinically symptomatic.At the time of diagnosis, Clock GCTB are classically described as lucent, eccentric lesions with nonsclerotic margins, located within the epiphysis to a

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Changing teaching techniques and adapting new technologies to improve student learning in an introductory meteorology and climate course

Responding to the call for reform in science education, changes were made in an introductory meteorology and climate course offered at a large public university.These changes were a part of a larger project aimed at deepening and extending a program of science content courses that model effective teaching strategies for prospective Ski de fond - Ac

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