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Background and objective In the transformative era of artificial intelligence, its integration into various spheres, especially healthcare, has been promising. The objective of this study was to analyze the performance of ChatGPT, as open-source Large Language Model (LLM), in its different versions on the recent European Board of Urology (EBU) in-service assessment questions. Design and setting We asked multiple choice questions of the official EBU test books to ChatGPT-3.5 and ChatGPT-4 for the following exams: exam 1 (2017–2018), exam 2 (2019–2020) and exam 3 (2021–2022). Exams were passed with ≥60% correct answers. Results ChatGPT-4 provided significantly more correct answers in all exams compared to the prior version 3.5 (exam 1: ChatGPT-3.5 64.3% vs. ChatGPT-4 81.6%; exam 2: 64.5% vs. 80.5%; exam 3: 56% vs. 77%, p  < 0.001, respectively). Test exam 3 was the only exam ChatGPT-3.5 did not pass. Within the different subtopics, there were no significant differences of provided correct answers by ChatGPT-3.5. Concerning ChatGPT-4, the percentage in test exam 3 was significantly decreased in the subtopics Incontinence (exam 1: 81.6% vs. exam 3: 53.6%; p  = 0.026) and Transplantation (exam 1: 77.8% vs. exam 3: 0%; p  = 0.020). Conclusion Our findings indicate that ChatGPT, especially ChatGPT-4, has the general ability to answer complex medical questions and might pass FEBU exams. Nevertheless, there is still the indispensable need for human validation of LLM answers, especially concerning health care issues.

Introduction: Testicular germ cell tumors (TGCTs) are a paradigm for the use of serum tumor markers in clinical management. However, conventional markers such as alpha-fetoprotein (AFP), beta-human chorionic gonadotropin (hCG), and lactate dehydrogenase (LDH) have quite limited sensitivities and specificities. Within the last decade, the microRNA-371a-3p (miR371) emerged as a possible new biomarker with promising features. Areas covered: This review covers the typical features as well as possible clinical applications of miR371 in TGCT patients, such as initial diagnosis, therapy monitoring, and follow-up. Additionally, technical issues are discussed. Expert opinion: With a sensitivity of around 90% and specificity >90%, miR371 clearly outperforms the classical serum tumor markers in TGCTs. The unique features of the test involve the potential of modifying recent standards of care in TGCT. In particular, miR371 is expected to aid clinical decision-making in scenarios such as discriminating small testicular TGCT masses from benign ones prior to surgery, assessing equivocal lymphadenopathies, and monitoring chemotherapy results. Likewise, it is expected to make follow-up easier by reducing the intensity of examinations and by sparing imaging procedures. Overall, the data presently available are promising, but further prospective studies are required before the test can be implemented in standard clinical care.

Background Video content has become an increasingly valuable tool in medical education, particularly for teaching hands-on skills like sonography and clinical examination. This study evaluates the satisfaction and content of sonography and clinical examination videos on the AMBOSS platform, a prominent medical education resource in Germany. Objective The goal of this study was to compare how effective and well-received sonography and clinical examination videos are on the AMBOSS platform. The study looked at aspects such as the medical and technical quality of the videos, their usefulness for learning, and overall user satisfaction. Methods Eighteen instructional videos were chosen and made accessible on the AMBOSS platform, grouped into sonography ( n  = 9) and clinical examination ( n  = 9) categories. Users were asked to voluntarily and anonymously fill out a questionnaire evaluating the videos. Over 49.5 months, data from 1,643,274 video views and 936 completed questionnaires were gathered. Results Clinical examination videos were watched significantly more often than sonography videos (86 vs. 14%). Both video types were highly rated in terms of medical and technical quality. However, sonography videos were judged superior in technical quality and clarity, whereas clinical examination videos were preferred for their medical quality and practical application. Feedback from users indicated a desire for more detailed annotations and clearer explanations. Conclusion The findings underline the crucial role of video resources in medical education, particularly in teaching practical skills. To improve educational outcomes, it is important to tailor content to the specific needs of medical students and professionals, incorporate user feedback, and take advantage of technological advancements.

PurposeBattle-related trauma is common in modern warfare and can lead to genitourinary injuries. In Western countries, urogenital injuries are rare in the civilian environment. The main objective of this study was to assess urological workload for surgeons on deployment.Material and methodsData were acquired over a period of five years of deployment in a U.S. facility in Afghanistan.ResultsGerman urological surgeons treated on average one urologic outpatient per day and performed 314 surgical interventions overall. Surgical interventions were categorized as battle-related interventions (BRIs, n = 169, 53.8%) and nonbattle-related interventions (non-BRIs, n = 145, 46.2%). In the BRI group, interventions were mainly performed on the external genitalia (n = 67, 39.6%), while in the non-BRI group, endourological procedures predominated (n = 109). This is consistent with a higher rate of abdominal or pelvic procedures performed in the BRI group (n = 51, 30.2%).Furthermore, the types of interventions performed on the external genitalia differed significantly. In the BRI group, 58.2% (n = 39) of interventions were scrotal explorations, but none of those procedures were performed in the non-BRI group (p < 0.001). However, 50.0% (n = 13) of scrotal explorations in the non-BRI group were due to suspected torsions of the testes followed by orchidopexy (BRI: n = 1, 1.5%, p < 0.001). Concerning outpatients, the consultation was mainly due to complaints concerning the external genitalia (32.7%, n = 252) or kidney/ureteral stones (23.5%, n = 181).ConclusionWhile the treatment of urological outpatients in a deployment setting resembles the treatment of soldiers in Germany, BRIs requires abdominal/retroperitoneal urosurgical skills and basic skills in reconstructive surgery.

BackgroundTesticular germ cell tumors (GCTs) are aggressive but highly curable tumors. To avoid over/undertreatment, reliable clinical staging of retroperitoneal lymph-node metastasis is necessary. Current clinical guidelines, in their different versions, lack specific recommendations on how to measure lymph-node metastasis.ObjectiveWe aimed to assess the practice patterns of German institutions frequently treating testicular cancer for measuring retroperitoneal lymph-node size.MethodsAn 8‐item survey was distributed among German university hospitals and members of the German Testicular Cancer Study Group.ResultsIn the group of urologists, 54.7% assessed retroperitoneal lymph nodes depending on their short-axis diameter (SAD) (33.3% in any plane, 21.4% in the axial plane), while 45.3% used long-axis diameter (LAD) for the assessment (42.9% in any plane, 2.4% in the axial plane). Moreover, the oncologists mainly assessed lymph-node size based on the SAD (71.4%). Specifically, 42.9% of oncologists assessed the SAD in any plane, while 28.5% measured this dimension in the axial plane. Only 28.6% of oncologists considered the LAD (14.3% in any plane, 14.3% in the axial plane). None of the oncologists and 11.9% of the urologists (n = 5) always performed an MRI for the initial assessment, while for follow-up imaging, the use increased to 36.5% of oncologists and 31% of urologists. Furthermore, only 17% of the urologists, and no oncologists, calculated lymph-node volume in their assessment (p = 0.224).ConclusionClear and consistent measurement instructions are urgently needed to be present in all guidelines across different specialistic fields involved in testicular cancer management.

Purpose This ex vivo study aimed to compare a newly developed dual-source photon-counting CT (PCCT) with a 3rd generation dual-source dual-energy CT (DECT) for the detection and measurement (stone lengths and volumetrics) of urinary stones. Methods 143 urinary stones with a known geometry were physically measured and defined as reference values. Next, urinary stones were placed in an anthropomorphic abdomen-model and were scanned with DECT and PCCT. Images were read by two experienced examiners and automatically evaluated using a specific software. Results DECT and PCCT showed a high sensitivity for manual stone detection of 97.9% and 94.4%, and for automatic detection of 93.0% and 87.4%, respectively. Compared to that uric acid and xanthine stones were recognized slightly worse by DECT and PCCT with manual stone detection (93.3% and 82.2%), and with automatic detection (77.8% and 60.0%). All other stone entities were completely recognized. By comparing the maximum diameter of the reference value and DECT, Pearson-correlation was 0.96 ( p  < 0.001) for manual and 0.97 ( p  < 0.001) for automatic measurement, and for PCCT it was 0.94 ( p  < 0.001) for manual and 0.97 ( p  < 0.001) for automatic measurements. DECT and PCCT can also reliably determine volume manually and automatically with a Pearson-correlation of 0.99 ( p  < 0.001), respectively. Conclusion Both CTs showed comparable results in stone detection, length measurement and volumetry compared to the reference values. Automatic measurement tends to underestimate the maximum diameter. DECT proved to be slightly superior in the recognition of xanthine and uric acid stones.

Background. Infections and autoimmune disorders are more frequent in Down syndrome, suggesting abnormality of adaptive immunity. Although the role of B cells and antibodies is well characterized, knowledge regarding T cells is limited. Methods. Lymphocyte subpopulations of 40 children and adolescents with Down syndrome and 51 controls were quantified, and phenotype and functionality of antigen-specific effector T cells were analyzed with flow cytometry after polyclonal and pathogen-specific stimulation (with varicella-zoster virus [VZV] and cytomegalovirus [CMV]). Results were correlated with immunoglobulin (Ig) G responses. Results. Apart from general alterations in the percentage of lymphocytes, regulatory T cells, and T-helper 1 and 17 cells, all major T-cell subpopulations showed higher expression of the inhibitory receptor PD-1. Polyclonally stimulated effector CD4⁺ T-cell frequencies were significantly higher in subjects with Down syndrome, whereas their inhibitory receptor expression (programmed cell death 1 [PD-1] and cytotoxic T-lymphocyte antigen 4 [CTLA-4]) was similar to that of controls and cytokine expression profiles were only marginally altered. Pathogen-specific immunity showed age-appropriate levels of endemic infection, with correlation of CMV-specific cellular and humoral immunity in all subjects. Among VZV IgG–positive individuals, a higher percentage of VZV-specific T-cell-positive subjects was seen in those with Down syndrome. Conclusions. Despite alterations in lymphocyte subpopulations, individuals with Down syndrome can mount effector T-cell responses with similar phenotype and functionality as controls but may require higher effector T-cell frequencies to ensure pathogen control.

Background: In staging for testicular germ cell tumor (GCT), current guidelines lack consensus regarding the measurement of retroperitoneal lymph node metastasis, concerning the recommended plane and dimension. This exploratory study aimed to assess its impact on clinical stage (cS) and therapy. Methods: We retrospectively examined 154 cSI (retroperitoneal lymph nodes < 10 mm in axial short-axis diameter (SAD)) GCT patients, without adjuvant therapy and a follow-up ≥ 24 months. Retroperitoneal lymph nodes were measured in staging images in different dimensions (SAD and long-axis diameter (LAD)) and planes (axial, sagittal and coronal). Results: Overall survival was 100%, with 82% free of recurrence after a median follow-up of 83 months. All patients were classified as cSI, based on axial SAD (RECIST 1.1). However, significantly more patients would have been classified as cSIIA (0% vs. 38% vs. 52%) or even cSIIB (0% vs. 1% vs. 25%) according to axial LAD (SWENOTECA, German S3 guideline) or maximum LAD in any plane (EAU, ESMO, AJCC and onkopedia) (p < 0.001). Overtreatment was predicted in 0%, 31% and 61% of patients based on axial SAD, axial LAD and maximum LAD, while undertreatment was estimated at 18%, 10% and 2%, respectively, (p < 0.001). Conclusions: These findings indicate considerable variability in cS based on current lymph node staging recommendations, suggesting that axial SAD (RECIST 1.1) could be the most appropriate parameter for standardized guideline recommendations.