In front of a patient with arthritis, clinical good-sense tells that the most probable diagnosis are the most prevalent ones. Nevertheless, we have to exclude a multiplicity of other aetiologies, less frequent, but with highest implications in the therapeutic conduct. Infections by Brucella and by Borrelia are rare causes of chronic arthritis, yet are diagnosis to consider, even when the clinical manifestations...
Relapsing Polycondritis is a rare connective tissue disease of unknown aetiology that is manifested by inflammatory changes in cartilaginous tissues but the immune damage can spread and involve other tissues.Six patients with relapsing poycondritis treated in our service, between 1990 and 2003, were reviewed. The clinical features, age of onset, time from onset to diagnosis, disease associations and treatment w...
Lipoma arborescens is a rare intraarticular lesion of unknown etiology. The disorder usually presents as painless swelling and recurrent joint effusion. It is typically located in the knee (especially the suprapatellar bursa), though it has also been described in other joints. Laboratory test results are normal, as well as aspirated synovial fluid. Synovectomy is curative in most cases. The authors report a rev...
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