BACKGROUND: The Problematic Internet use among adolescents is an increasingly discussed topic in connection with the continuous development of technologies. If it enters to the period of adolescent age factor of hematoncological disease, which requires long term tratment and isolation for a long time, the risk of growth of non-substance addictive behavior is likely to increase in this context. AIM: The main aim of the research was to find out the prevalence of Problematic Internet use in a group of adolescent patients after the intensive cancer treatment within the Department of Pediatric Hematology and Oncology of the University Hospital in Motol (KDHO). Another aim was to map specific characteristics that may be a predictor of later risk behavior and to find out possible correlation between these characteristics and problematic Internet use. METHODS: The concept of the research is based on quantitative methods of epidemiological cases and controls study. The data were collected through a screening questionnaire survey using a compilation of a short version of the Problematic Internet Use Questionnaire (PIU Q- SF 6) and Substance Use Risk Profile (SURPS) personality traits). Data were evaluated using descriptive statistics and the χ2 test. The p value p < 0,05 was determined as statistically...

Hematooncological diseases are often accompanied by dietary restriction, especially in cytotoxic therapy. The main purpose of the work was to assess the effect of high-dose chemotherapy on the change of nutritional status in two groups of hematooncological patients. A total of 16 patients were enrolled. Changes of the body composition were evaluated using bioelectrical impedance analysis supplemented by monitoring of biochemical nutritional indicators. Observations showed that in both groups the majority lost weight. In the first group of eight patients with acute myeloid leukemia observed during three consecutive hospitalizations, the median of change of body weight was -3.7 kg (-4.3%). Loss of lean body mass with a median value of -4.8 kg (-7.2%) was detected at all patients. Body fat was reduced at half of the patients. In some cases, with length of observation, there was an increase in fat mass along with visceral fat. In the second group, which included eight patients (after autologous hematopoietic stem cell transplantation) at whom one hospitalization was evaluated, body weight was reduced at six patients. The medianof change of body weight was -2.1 kg (-2.3%). At five patients, the treatment representeda loss of active metabolic mass. The change of the weight of the lean body mass was shown...