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AIM: Risk behaviours--as they are defined by specialist literature for the damage these behaviours cause to young people's health and/or life--are getting more and more frequent among young people. They range from self-injuring behaviours to the consequences of a precocious, high-risk and/or promiscuous sexual activity, from abnormal eating behaviours to the deaths from fun. METHODS: The inquiry concerned a group of university students (100 males and 100 females), selected at random from the Faculties of Medicine and Surgery, Psychology, Economy and Jurisprudence of the University of Palermo, who were asked to answer a questionnaire composed of 91 questions and structured in 4 sections. The first section regards associate-identifying information; the second one inquires on experiences and requirements concerning sexuality; the third section explores the state of health and the use of drugs and alcohol; the fourth section looks into relations with others. RESULTS: The analysis of our data revealed that young people have different high-risk behaviours (use of drugs and alcohol, non protected sexual intercourse, carelessness for one's and one's partner's serological state); this is associated to poor information, as complained by the people interviewed, on the prevention of sexually transmissible diseases, use of drugs and alcohol. CONCLUSIONS: The conclusion is drawn that the new modalities of the assumption of risk by young people would correspond to the climate of vagueness, lack of limits, meanings and values which characterize the present society.

Background Current prognostication of gastrointestinal stromal tumours is validated on/applies to resected tumours, mainly because surgery is recommended whenever possible. However, pre-treatment prognostication is increasingly warranted, considering the follow-up strategy recently admitted for expectedly low-risk tumours and the possible distinctive molecular features/spontaneous regression of some small cases. Aims To investigate whether endoscopic ultrasound-guided fine-needle tissue acquisition-biopsies reflect prognosticators of resected gastrointestinal stromal tumours, for possibly developing reliable pre-treatment prognostic criteria. Methods The applicability/reliability of mitotic index/5 mm 2 and MIB1 proliferative index/1000 cells were tested in 35 endoscopic ultrasound-guided fine-needle tissue acquisition-biopsies diagnosed as gastrointestinal stromal tumour, subsequently resected without intervening therapy, consecutively collected in thirty months. Size and mitotic/proliferative indexes were compared with resection specimens. The feasibility of bioptic genotyping was also tested. Results 35 patients were studied (45.7% males; mean age 61.6 years, range 26–83 years). Mitotic/proliferative indexes were determinable in 68.6%/88.6% of biopsies, respectively; they were nevertheless underestimated, as happened with endoscopic ultrasound-determined tumour size. Bioptic genotyping revealed reliable. Conclusions Endoscopic ultrasound-guided fine-needle tissue acquisition does not reliably reflect gastrointestinal stromal tumours’ proliferation and size. Alternative parameters should be validated for a pre-surgical prognostic classification. Considering the emerging potentially prognostic genetic markers in gastrointestinal stromal tumours, the reliability of bioptic genotyping is a promising result.