The international skeletal society outreach programme in Tunisia 2011

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Association rules based ontology enrichment

International audienceAmong the most powerful tools for knowledge representation, we cite the ontology which allows knowledge structuring and sharing. In order to achieve efficient domain knowledge bases content, the latter has to establish well linked and knowledge between its components. In parallel, data mining techniques are used to discover hidden structures within large databases. In particular, association rules are used to discover co-occurrence relationships from past experiences. In this context, we propose, to develop a method to enrich existing ontologies with the identification of novel semantic relations between concepts in order to have a better coverage of the domain knowledge. The enrichment process is realized through discovered association rules. Nevertheless, this technique generates a large number of rules, where some of them, may be evident or already declared in the knowledge base. To this end, the generated association rules are categorized into three main classes: known knowledge, novel knowledge and unexpected rules. We demonstrate the applicability of this method using an existing mammographic ontology and patient's records

Superselective embolisation of bilateral superior vesical arteries for management of intractable hematuria in context of metastatic bladder cancer

Hematuria due to locally advanced or metastatic bladder cancer is a common condition and is often a management problem. Percutaneous embolisation is a mini-invasive option to handle this situation. We report a case of a patient with a metastatic bladder cancer and who presented with an abundant hematuria and severe anemia. After failure of endoscopic resections and “flush” of radiotherapy haemostatic and refusal of cystectomy by the patient, he was treated by superselective embolisation of bilateral superior bladder arteries with excellent immediate results. The technique is safe and effective in the short term. The long-term effectiveness requires further investigation

Myocardial and liver iron overload, assessed using T2* magnetic resonance imaging with an excel spreadsheet for post processing in Tunisian thalassemia major patients

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