30 research outputs found
Malignant gastrointestinal stromal tumor of the ampulla of Vater presenting with obstructive jaundice
Malignant gastrointestinal stromal tumor (GIST) consists a rare neoplasm, developing in small intestine and stomach. The presenting manifastations include weakness, weight loss, nausea, melena and anaemia. The present case refers to a 65 years old female patient with a GIST of the ampulla of Vater presenting with obstructive jaundice. Diagnosis was achieved pre-operatively by biopsies collected through diagnostic ERCP. The tumour was locally excised, with preservation of the ampulla. The histological analysis suggested low grade GIST positive for both CD 117 <i> (c-kit)</i> and CD34. Two years after the surgery the patient remains free of disease. Malignant GIST of the ampulla of the Vater is extremely rare as only few similar cases have been described in the literature. This is the first time a GIST being presented as obstructive jaundice ever reported. Despite the unavailability of EUS-FNA, the diagnosis was set preoperatively and the tumor was resected
Case Report- Malignant gastrointestinal stromal tumor of the ampulla of Vater presenting with obstructive jaundice
Malignant gastrointestinal stromal tumor (GIST) consists a rare
neoplasm, developing in small intestine and stomach. The presenting
manifastations include weakness, weight loss, nausea, melena and
anaemia. The present case refers to a 65 years old female patient with
a GIST of the ampulla of Vater presenting with obstructive jaundice.
Diagnosis was achieved pre-operatively by biopsies collected through
diagnostic ERCP. The tumour was locally excised, with preservation of
the ampulla. The histological analysis suggested low grade GIST
positive for both CD 117 (c-kit) and CD34. Two years after the surgery
the patient remains free of disease. Malignant GIST of the ampulla of
the Vater is extremely rare as only few similar cases have been
described in the literature. This is the first time a GIST being
presented as obstructive jaundice ever reported. Despite the
unavailability of EUS-FNA, the diagnosis was set preoperatively and the
tumor was resected
Logout in Single Sign-on Systems
Part 7: Session 5 - Federated Identity ManagementInternational audienceSingle sign-on (SSO) helps users to cope with many online services that require authentication. Systems such as OpenID and SAML-based Shibboleth offer federated identity management where an Identity Provider authenticates the user on behalf of the services. Much research concentrates on making authentication stronger, preventing phishing and making the systems more user friendly but less attention has been paid to the termination of the authentication sessions i.e. logout. It is, however, equally important that the sessions do not remain open when, for example, a student using shared computers in a university library leaves the workstation. In this article, we describe challenges related to logout in federated identity management on web based services and give guidelines for implementing reliable logout from services that use single sign-on