Tętniakami nazywamy każde poszerzenie światła naczynia tętniczego przekraczające 50% średnicy w stosunku do średnicy uważanej za normę dla danego odcinka aorty. Wykrywane są często przypadkowo podczas wykonywania innych badań. Tętniaki aorty piersiowej dzielą się na prawdziwe i rozwarstwiające.

authors' contribution wkład autorów: a. Study design/planning zaplanowanie badań B. Data collection/entry zebranie danych c. Data analysis/statistics dane-analiza i statystyki D. Data interpretation interpretacja danych E. Preparation of manuscript przygotowanie artykułu F. literature analysis/search wyszukiwanie i analiza literatury G. Funds collection zebranie funduszy Summary Background. coronary arteriosclerosis risk factors increase the probability of the coronary heart disease and accompanying complications to a significant extent, acting independently from other circumstances. Material and methods. the study was conducted in a group of 250 students of the 1st-year medical studies, using an independently prepared questionnaire relating to the risk factors and particular lifestyles. Results. 1. level of knowledge of the examined students on coronary arteriosclerosis risk factors: obesity-250(100%); reduced physical activity-240(96%); smoking-230(92%); unhealthy diet-223(89%); elevated lDl cholesterol concentration-218(87%); arterial hypertension-210(84%). 2. Incidence of coronary arteriosclerosis risk factors in students: strong family history-75(30%); excessive stress-50(20%); reduced physical activity-190(76%); smoking-55(22%), alcohol abuse-95(38%). 3. lifestyle of the examined group of students: eating fast-food-180 (72%); drinking energetic beverages-82(33%); "trying" and using drugs-88(35%); insufficient amount of sleep-190(76%). Conclusions. 1. level of the examined students' knowledge on coronary arteriosclerosis risk factors is satisfactory. 2. Despite the satisfactory level of knowledge on risk factors, their incidence in the tested group is significant. 3. Majority of the examined students live a healthy lifestyle.

Microscopic colitis (MC) is a common cause of unexplainable, chronic diarrhea. The disease is characterized by the presence of clinical symptoms, a normal colonoscopy and typical histopathological changes upon microscopic examination. The aim of the study was to present a case of an atypical histological form of MC. A 56 year-old man presented with chronic, watery diarrhea. Gastrointestinal infection had been excluded. The colon appeared almost normal on the colonoscopy. Inconsistent histological findings were observed. The pathology of randomly taken colon biopsies showed collagenous colitis (CC; thickness of collagen bands > 10 µm, < 20 IELs). Six months later during a follow-up colonoscopy, colonic specimens revealed typical findings of lymphocytic colitis (LC), namely, no thickened subepithelial collagen bands were identified. The authors analyzed the risk factors, diagnosis, treatment response, clinical course and the atypical histological outcomes.