So the presentation of the extramedullary disease may differ. The paraosseous spread from the bone, this really doesn’t make a major impact on the course of the disease. This is called the paraskeletal or paraparaosseous form. The real extramedullary disease are the ones which are not in the proximity of the bone or bone marrow, but they occur such as in the skin, in organs such as the liver, in lymph nodes, in, for instance, the lungs or even in the central nervous system...
So the presentation of the extramedullary disease may differ. The paraosseous spread from the bone, this really doesn’t make a major impact on the course of the disease. This is called the paraskeletal or paraparaosseous form. The real extramedullary disease are the ones which are not in the proximity of the bone or bone marrow, but they occur such as in the skin, in organs such as the liver, in lymph nodes, in, for instance, the lungs or even in the central nervous system. So the symptoms, the presentations are defined by the localization. In the skin you can notice a very bizarre type of infiltrations, which can grow up and in lymph nodes may enlarge and the intra-abdominal lesions may have a compression on for instance the urinary tract and also on the lymphatic system which causes a swelling on the legs. So there is a very bizarre presentation with different symptomatology.
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