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BACKGROUND The significance of a positive UroVysion FISH assay is uncertain in patients with normal cystoscopy. This multicenter study evaluates the clinical significance of a positive FISH assay in patients with no visible tumor and excluding those with a positive cytology. METHODS A multi-institutional, retrospective study of patients with a history of(More)
Tumors of the ampulla-pancreatobiliary tract are encountered increasingly; however, their staging can be highly challenging due to lack of familiarity. In this review article, the various issues encountered in staging of these tumors at the pathologic level are evaluated and possible solutions for daily practice as well as potential improvements for future(More)
This paper introduces a simple and computationally efficient algorithm for conversion formulae between moments and cumulants. The algorithm provides just one formula for classical, boolean and free cu-mulants. This is realized by using a suitable polynomial representation of Abel polynomials. The algorithm relies on the classical umbral calculus , a(More)
By a symbolic method, we introduce multivariate Bernoulli and Euler polynomials as powers of polynomials whose coefficients involve multivariate Lévy processes. Many properties of these polynomials are stated straightforwardly thanks to this representation, which could be easily implemented in any symbolic manipulation system. A very simple relation between(More)
Objectives To evaluate the clinical usefulness of lung biopsy in ventilated patients admitted to an Intensive Care Unit. Methods Retrospective descriptive study that included 16 ventilated patients admitted to the ICU, which underwent a lung biopsy between 2008 and 2013.oalveolar lavage (BAL), radiological pattern and histology, were analyzed. Changes in(More)
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