Hierarchical graph transformations with meta-rules

This paper is concerned with hierarchical graph models and graph transformation rules, specifically with the problem of transforming a part of graph which may contain subordinated nodes and edges. Meta-rules are proposed as a formal way of representing transformations which remove or duplicate a node along with its contents. The paper discusses the behaviour of meta-rules when applied to different types of hierarchical graphs, possible failure cases, and concludes by introducing a type of hierarchical graphs in which meta-rules can always be successfully expanded

Towards a graph-based model of computer games

This paper proposes a new holistic approach to a formal model of computer games. The story and structure of a computer game is represented by a hierarchical layered graph, meanwhile the way that the game is played – by graph transformations. This approach enables comparative description of different games, analysis of dependencies between a game structure and players’ strategies, automatic gameplay generation, and switching from single- to multi­player mode

Embolizacja tętnic macicznych – zagadnienia kliniczne

The aim of the study was to present clinical issues concerning uterine artery embolization (UAE) in women with uterine fibromas. In order to ensure high clinical efficiency of UAE and prevent subsequent complications, it is necessary to carefully select patients eligible for the procedure. Patients with intramural fibromas, who do not plan to conceive, are the best candidates for the procedure. Fibroma necrosis, with following infection, and premature ovarian failure remain to be the most common complications after UAE. UAE may cause amenorrhea and increase FSH levels, what is typical for menopause. Thus, it may be responsible for problems with conception as well as optimal development of a pregnancy. It may also cause premature, iatrogenic menopause. This complication significantly more frequently occurs in women over the age of 45 as compared to younger patients. UAE is considered as an alternative therapeutic procedure, available to women who do not desire the surgery or wish to preserve the uterus. Patients subject to this procedure should be informed about the possible side effects.Celem pracy było przedstawienie zagadnień klinicznych związanych z zabiegami embolizacji tętnic macicznych (UAE) w przypadku objawowych mięśniaków macicy. Zwrócono uwagę, że odpowiednia kwalifikacja chorych do zabiegu ma kluczowe znaczenie dla wysokiej skuteczności klinicznej oraz zapobiegania powikłaniom po UAE. Kandydatkami powinny być kobiety z objawowymi mięśniakami położonymi śródściennie, które w przyszłości nie planują zachodzić w ciążę. Przedwczesne wygasanie czynności jajników, obok martwicy mięśniaka z następową infekcją stanowi jedno z najczęstszych powikłań embolizacji. Może być przyczyną przedwczesnej, jatrogennej menopauzy oraz trudności w zajściu i donoszeniu ciąży. UAE może niekorzystnie wpłynąć na funkcję jajników, powodując czasowe lub stałe zatrzymanie miesiączki, a także typowy dla okresu menopauzy wzrost poziomu FSH. Znacznie częściej to powikłanie UAE obserwuje się u kobiet po 45 roku życia, niż młodszych. Embolizacja tętnic macicznych przeprowadzana w celu leczenia objawowych mięśniaków macicy stanowi alternatywną opcję terapeutyczną, istotną dla kobiet, które nie chcą poddawać się operacji lub pragnących zachować macicę. Chore poddawane tego typu leczeniu powinny być poinformowane o możliwych skutkach ubocznych

Survivin expression at the mRNA level in tumors and the protein concentration in the serum and peritoneal fluid in patients with serous ovarian tumors

Objectives: Ovarian cancer is one of the gynecological cancers that have the worst prognosis. The expression of the proteins from the IAP family (inhibitor of apoptosis protein), including survivin, is observed in many types of cancer. The aim of the study was to evaluate survivin at the mRNA level in tumors and the protein concentration in the serum and peritoneal fluid of patients with serous ovarian cancer in order to assess the relationship between the concentration of survivin and the histological subtypes of cancer. Material and methods: The study group consisted of 55 women, including patients with serous ovarian cancer (n = 30, nine low-grade serous carcinoma LGSC, 21 high-grade serous carcinoma HGSC), serous cysts (n = 10) and the control group (n = 15). The concentration of protein in the peritoneal fluid and serum was assessed using ELISA tests. The expression of survivin gene BIRC5 in the tumors was assessed using the RT-qPCR method. Results: The data that was obtained indicated that the concentration of survivin was higher in the serum of the women with serous ovarian cancer compared those that had benign tumors (p < 0.05) and the control group (p < 0.001). The survivin concentration was also higher in both the serum and peritoneal fluid in the HGSC group compared to the LGSC group (p < 0.001). The mRNA level was highest in the HGSC group, and there was a statistically significant difference compared to those in the benign tumor group and HGSC group ( p < 0.05). Conclusions: The observed changes prove that the expression level increases significantly in HGSC in both the protein and mRNA levels. Based on these findings, it can be assumed that assessing this parameter could be a useful additional indicator of the progression and differentiation of this type of cancer. However, this requires further research in a larger group of patients and possibly in other types of ovarian cancer

Mechanical thrombectomy in acute stroke – Five years of experience in Poland

Objectives Mechanical thrombectomy (MT) is not reimbursed by the Polish public health system. We present a description of 5 years of experience with MT in acute stroke in Comprehensive Stroke Centers (CSCs) in Poland. Methods and results We retrospectively analyzed the results of a structured questionnaire from 23 out of 25 identified CSCs and 22 data sets that include 61 clinical, radiological and outcome measures. Results Most of the CSCs (74%) were founded at University Hospitals and most (65.2%) work round the clock. In 78.3% of them, the working teams are composed of neurologists and neuro-radiologists. All CSCs perform CT and angio-CT before MT. In total 586 patients were subjected to MT and data from 531 of them were analyzed. Mean time laps from stroke onset to groin puncture was 250±99min. 90.3% of the studied patients had MT within 6h from stroke onset; 59.3% of them were treated with IV rt-PA prior to MT; 15.1% had IA rt-PA during MT and 4.7% – emergent stenting of a large vessel. M1 of MCA was occluded in 47.8% of cases. The Solitaire device was used in 53% of cases. Successful recanalization (TICI2b–TICI3) was achieved in 64.6% of cases and 53.4% of patients did not experience hemorrhagic transformation. Clinical improvement on discharge was noticed in 53.7% of cases, futile recanalization – in 30.7%, mRS of 0–2 – in 31.4% and mRS of 6 in 22% of cases. Conclusion Our results can help harmonize standards for MT in Poland according to international guidelines