AIRP best cases in radiologic-pathologic correlation: synovial chondrosarcoma.

Department of Radiology, University of Connecticut-John Dempsey Hospital, Farmington, USA.
Radiographics (Impact Factor: 2.73). 11/2011; 31(7):1883-8. DOI: 10.1148/rg.317105210
Source: PubMed
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    ABSTRACT: This article discusses several benign tumors and proliferative processes of the synovium including giant cell tumor of the tendon sheath, pigmented villonodular synovitis, synovial chondromatosis, lipoma arborescens, and synovial hemangioma, lipoma, and fibroma. We review the clinical features and imaging characteristics of each entity, with a special focus on the unique imaging findings that can enable a confident diagnosis or a limited differential diagnosis.
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    ABSTRACT: Cerebral tuberculosis is the most severe type of extrapulmonary disease that is in developing countries highly predominant in children. Meningeal tuberculosis is the most common form and usually begins with respiratory infection followed by early haematogenous dissemination to extrapulmonary sites involving the brain. In comparison with the lung, Mycobacterium tuberculosis induces a very different immune response when infect the central nervous system. Herein, we review several aspects of the pathogenesis and immune response in pulmonary and cerebral tuberculosis in humans and experimental models and discuss the implications of this response in the cerebral infection outcome.
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    ABSTRACT: Definitive determination of the cause of articular swelling may be difficult based on just the clinical symptoms, physical examinations and laboratory tests. Joint disorders fall under the realms of rheumatology and general orthopaedics; however, patients with joint conditions manifesting primarily as intra-articular and peri-articular soft tissue swelling may at times be referred to an orthopaedic oncology department with suspicion of a tumour. In such a situation, an onco-radiologist needs to think beyond the usual neoplastic lesions and consider the diagnoses of various non-neoplastic arthritic conditions that may be clinically masquerading as masses. Differential diagnoses of articular lesions include infectious and non-infectious synovial proliferative processes, degenerative lesions, deposition diseases, vascular malformations, benign and malignant neoplasms and additional miscellaneous conditions. Many of these diseases have specific imaging findings. Knowledge of these radiological characteristics in an appropriate clinical context will allow for a more confident diagnosis.