La Revue de médecine interne
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Patients with systemic sclerosis (SSc) have an increased risk of malignancy. In this study, we aimed to analyze the prevalence of cancer, the risk factors and the impact on overall survival. ⋯ The history of renal scleroderma crisis and the positivity of anti-topoisomerase I antibodies were associated with an increased risk of cancer in SSc patients in this monocentric study.
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Systemic sclerosis is a rare connective tissue disease characterized by skin and several internal organ fibrosis, systemic vasculopathy and immune abnormalities. Even if fibroblasts and endothelial cells dysfunction, as well as lymphocytes and other immune cells implication are now well described, the exact origin and chronology of the disease pathogenesis remain unclear. Oxidative stress, influenced by genetic and environmental factors, seems to play a key role. ⋯ Nevertheless, this treatment can expose to important, life-threatening toxicity. In the last decade, new mechanisms implicated in the pathogenesis of systemic sclerosis have been unraveled, bringing new therapeutic opportunities. In this review, we offer to focus on recent insights in the knowledge of systemic sclerosis pathogenesis and its implication in current and future medical care.
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Oxygen therapy is used to reverse hypoxemia since more than a century. Current usage is broader and includes routine oxygen administration despite normoxemia which may result in prolonged periods of hyperoxemia. While systematic oxygen therapy was expected to be of benefit in some ischemic diseases such as stroke or acute myocardial infarction, recent randomised controlled trials (RCTs) have challenged this hypothesis by showing the absence of clinical improvement. ⋯ For patients at risk, oxygen therapy should be started when SpO2 is≤88% and stopped when it is>92%. For patients without risk factors, oxygen therapy should be started when SpO2 is≤92% and stopped when it is >96%. High-flow oxygen should only be used in a few diseases such as carbon monoxide poisoning, cluster headaches, sickle cell crisis and pneumothorax.
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Clonal hematopoiesis of undetermined significance or CHIP describes the identification, in individuals without hematologic disease, of one or more somatic mutations in hematopoietic cells. These mutations, detected by high-throughput genes sequencing (Next-Generation Sequencing or NGS), affect genes first identified in acute myeloid leukemia or myelodysplastic syndrome, such as DNMT3A, TET2 and ASXL1. ⋯ CHIP is also associated with an increased risk of overall mortality and cardiovascular diseases. CHIP detection using NGS is currently limited to basic science field, but recent studies suggest that it may be of clinical interest.