Practice of Fiducial Marker in Prostate Cancer: A Single-Center Experience with up to 6 Years’ Follow-up Results

We aimed to evaluate the long-term follow-up results of patients with prostate cancer implanted with ultrasound-guided fiducial marker(FM). Forty patients, between 2012-2017 were evaluated. Firstly, the gastrointestinal-genitourinary system side effects were questioned twice immediately after FM implant and in the median 6.5th year and the grading was performed via the NCI CTCAE-V5.0 test and compared. Secondly, in the late period, questions assessing genitourinary-gastrointestinal symptoms were asked using the EORTC QLQ-PR25 Module,and the complication status and patient comfort were assessed The mean symptom value for all patients in the EORTC QLQ-PR25 module was 17,33%. In the first assessment made according to the results obtained by questioning the genitourinarygastrointestinal symptoms related to the FM procedure both after the procedure and in the median 6.5th year,rectal bleeding was present in 2(4%),dysuria 3(6%),hematuria 5(11%) and frequency of urination in 5(11%) patients and in the second assessment,no new symptoms were added and the overall symptom rate decreased. In the first assessment,it was determined via NCI CTCAE-V 5.0 scale that the adverse effects of 9 patients (20%),who were identified with adverse effects,were grade 1 corresponding to mild side effects,and none of the patients experienced grade 2 or higher adverse events. In the second assessment,side effects were defined in 3 patients (7,5%) and grade 1 was mild. The ultrasound-guided FM implant procedure,which is used in prostate cancer radiotherapy is an easy,tolerable and safe technique that does not lead to adverse effects and loss of comfort in patients with long-term follow-u

Atmospheric Pressure Mass Spectrometry of Single Viruses and Nanoparticles by Nanoelectromechanical Systems

Mass spectrometry of intact nanoparticles and viruses can serve as a potent characterization tool for material science and biophysics. Inaccessible by widespread commercial techniques, the mass of single nanoparticles and viruses (>10MDa) can be readily measured by NEMS (Nanoelectromechanical Systems) based Mass Spectrometry, where charged and isolated analyte particles are generated by Electrospray Ionization (ESI) in air and transported onto the NEMS resonator for capture and detection. However, the applicability of NEMS as a practical solution is hindered by their miniscule surface area, which results in poor limit-of-detection and low capture efficiency values. Another hindrance is the necessity to house the NEMS inside complex vacuum systems, which is required in part to focus analytes towards the miniscule detection surface of the NEMS. Here, we overcome both limitations by integrating an ion lens onto the NEMS chip. The ion lens is composed of a polymer layer, which charges up by receiving part of the ions incoming from the ESI tip and consequently starts to focus the analytes towards an open window aligned with the active area of the NEMS electrostatically. With this integrated system, we have detected the mass of gold and polystyrene nanoparticles under ambient conditions and with two orders-of-magnitude improvement in capture efficiency compared to the state-of-the-art. We then applied this technology to obtain the mass spectrum of SARS-CoV-2 and BoHV-1 virions. With the increase in analytical throughput, the simplicity of the overall setup and the operation capability under ambient conditions, the technique demonstrates that NEMS Mass Spectrometry can be deployed for mass detection of engineered nanoparticles and biological samples efficiently.Comment: 38 pages, 6 figure

Examining the use of abdominal compression in stereotactic body radiotherapy for liver metastases: a single center’s experience of 10 years

INTRODUCTION: Stereotactic body radiotherapy (SBRT) with abdominal compression (AC) stands out due to the high tolerance and ease of application in the treatment of liver metastases. The present study aimed to report the safety and efficacy of the AC technique with 10-year follow-up outcomes. MATERIALS AND METHODS: A retrospective review was made of patients in the database who had liver metastases, who did not undergo surgery or any other ablative approach for metastases, and who underwent SBRT with AC. In-field local control (ifLC) and toxicity were evaluated as primary endpoints. RESULTS: The study examined 79 patients who underwent SBRT with AC between 2012 and 2021. Colorectal adenocarcinoma was the most common type of primary tumor (n = 32, 40.5%). The median follow-up was 14 (4–73) months. After treatment, one-year ifLC was 46.4%, six-month ifLC was 76%, one-year out-field local control (ofLC) was 13.6%, and six-month ofLC was 25%. According to the Common Terminology Criteria for Adverse Events Version 5.0, only 8 patients had low-grade acute gastrointestinal toxicity, and no patients had late toxicity. CONCLUSIONS: SBRT with AC is a well-tolerated and effective treatment modality for patients with liver metastases

The effect of adding selective neck dissection to surgery on adjuvant treatment selection and identification of metastasis in glomus tumors

Glomus tumors are rare tumors with malignant nature. Regional lymph node metastases are even rare and this could be contribute for determine to malignant form. The presence of lymph node involvement directs adjuvant treatment is still controversial. Positive imaging results might be helpful for decision of neck dissection. But results might sometimes be false negative. Here we present a case of malignant glomus tumor with regional lymph node metastasis was treated with neck dissection. [Cukurova Med J 2016; 41(0.100): 75-78

Radiotherapy results of patients with oral cavity and oropharynx tumours

OBJECTIVE

Current Statement of Intensive Care Units in Turkey: Data obtained from 67 Centers

OBJECTIVES: We aimed to obtain information about the characteristics of the ICUs in our country via a point prevalence study