Applicability of a short/rapid 13C-urea breath test for Helicobacter pylori: retrospective multicenter chart review study.

Background: Carbon labeled urea breath tests usually entail a two point sampling with a 20 to 30-minute gap. Our aim was to evaluate the duration of time needed for diagnosing Helicobacter pylori by the BreathID® System.

Methods: This is a retrospective multicenter chart review study.

The cyclin-dependent kinase inhibitor, p27, has no correlation with the malignant potential of GIST.

Background: Tumor size and mitotic activity are characteristically associated with the malignant potential and prognosis of gastrointestinal stromal tumors (GIST). However, since neither small tumor size nor low mitotic activity can rule out malignancy, additional factors that may predict malignant behavior have been suggested.

Aim: To evaluate the correlation between the cyclin-dependent kinase inhibitor (CDI), p27kip1, expression and the malignant potential of GIST.