Outcomes of oncological intended thoracic surgery after lung transplantation

Background

Lung cancer following lung transplantation (LT) may require thoracic surgery (TS). There is an urgent need for data on surgical feasibility, clinical and surgical characteristics, as well as outcome data.

Methods

We reviewed the medical records of LT patients who had undergone TS at the University Hospital Leipzig between the years 2000 and 2022. Data on medical and surgical history, pulmonary function test, arterial blood gas analysis, six-minute walking distance test, and surgical approach, perioperative management, anesthesiologic, and surgical procedures were analyzed.

Results

Among 248 LT patients, 13 patients (5.2%) developed lung cancer after 4.2 years on average and on 6 of them (46.2%), major TS procedure was performed for the resection of lung cancer. In one patient who underwent TS for a suspicious pulmonary nodule, it turned out to be a parenchymal scar. TS was carried out in 57.1% on the native lung and 42.9% on the transplant lung. Pneumonia and acute renal failure were predominantly observed postoperative complications. We found that the capacity of gas exchange either before or after TS was related to the degree of postoperative complications. The in-hospital survival was 71.4%.

Conclusions

Incidence of lung cancer is increased after LT. Follow-up care allows early diagnosis with a comparably high share of operable tumor stage. Cancer as well as postoperative complications were more likely after single lung transplantation (SLT). Postoperative morbidity and mortality are higher in this scarce group of patients and hence, warrants a centered and experienced interdisciplinary approach.

Lasting Effects of COVID-19 Pandemic on Prehospital Emergency Medical Service Missions

Purpose

The COVID-19 pandemic confronted prehospital emergency medical services (PHEMS) with immense challenges. This study aimed to investigate the development of PHEMS mission numbers and times in the COVID-affected region of Southwest Saxony (SWS).

Patients and Methods

This was a retrospective analysis of PHEMS in SWS during lockdown periods and equal time spans in the previous and following years. Differences were tested for statistical significance using the chi-squared test and one-way analysis of variance (ANOVA).

Results

The total number of missions showed a substantial drop during the first (-16.6%) and the second (-4.5%) lockdown period compared with the previous year. Next-year periods showed a recovery that was nearly equivalent to the starting point. The first lockdown period was not associated with longer overall mission times. The minutes spent at the scene differed significantly between the first lockdown period (31.1 ± 3.52 min), previous year (28.4 ± 4.84 min), and follow-up period (31.8 ± 0.98 min). During the second lockdown, the overall mission times (71.6 ± 2.91 min), response times in minutes (8.9 ± 0.49 min), and minutes spent at the scene (31.4 ± 2.99 min) were significantly longer. The minutes spent at the scene (32.3 ± 18.68 min) and the overall mission time (69.6 ± 1.92 min) remained significantly longer during the control period.

Conclusion

Our data confirm the impact of the SARS-CoV-2 pandemic on German PHEMS. It can be concluded that nationwide lockdown measures led to lasting effects regarding a reduction in the total mission number, transport-on-site released-ratio, and emergency time intervals in the following year, without lockdown restrictions. The lasting effects on the transport-on-site released-ratio and emergency time intervals call for a re-evaluation of the delivery of emergency services during pandemics. These findings can inform future policy decisions and resource allocations to ensure optimal emergency medical services.

Management of Children and Adolescents with Chest Trauma in Pediatric and Non-Pediatric Departments—A Claims Data Analysis

Background: To investigate the management of children and adolescents with isolated and combined chest trauma in pediatric (PD) and non-pediatric departments (non-PD). Methods: Anonymized claims data were provided by two large German statutory health insurance funds, covering 6.3 million clients over a 10-year period (2010–2019). Data were extracted for patients who had an inpatient ICD diagnosis of section S20–S29 (injuries to the thorax) and were ≤18 years of age. Demographic and clinical data were analyzed. Results: A total of 4064 children and adolescents with chest trauma were included (mean age 12.0 ± 5.0 years; 55% male). In 1928 cases (47.4%), treatment was provided at PD. Patients admitted to PD underwent CT imaging less frequently (8.1%; non-PD: 23.1%; p < 0.0001). Children with a chest drain treated at university/maximum care hospitals (UM) showed more injuries involving multiple body regions compared with non-UM (25.8% vs. 4.5%; p = 0.0061) without a difference in the length of hospital stay. Conclusion: Children and adolescents with chest trauma are treated almost equally often in pediatric and adult departments. CT is significantly less frequently used in pediatric departments. Patients with a chest drain treated at a UM showed more concomitant injuries without a longer hospital stay. However, the clinical validity of this finding is questionable.

A metagenomic-based study of two sites from the Barbadian reef system

We study the microbiome of sea water collected from two locations of the Barbadian coral reefs. The two sites differ in several environmental and ecological variables including their endogenous benthic community and their proximity to urban development and runoffs from inland watersheds. The composition of the microbial communities was estimated using whole genome DNA shotgun sequencing with adjuvant measurements of chemical and environmental qualities. Although both sites exhibit a similar degree of richness, the less urbanized site (Maycocks reef at Hangman's Bay) has a strong concentration of phototrophs whereas the more urbanized location (Bellairs reef at Folkstone) is enriched for copiotrophs, macroalgal symbionts and marine-related disease-bearing organisms from taxa scattered across the tree of life. Our results are concordant with previous profiles of warm ocean surface waters, suggesting our approach captures the state of each coral reef site, setting the stage for longitudinal studies of marine microbiome dynamics in Barbados.

SUPPLEMENTARY INFORMATION

The online version contains supplementary material available at 10.1007/s00338-022-02330-y.

Narrowing the therapeutic window?—A case-control study on the influence of the COVID-19 pandemic on the primary UICC stage of NSCLC

Background

General clinical perception suggests a decline in the diagnosis and treatment of lung cancer during the SARS-CoV-2 pandemic. Early diagnosis of non-small cell lung cancer (NSCLC) is crucial in therapeutic regimes as early stages are potentially curable by operation alone or with combined therapy. Pandemic-triggered overload of the healthcare system may have prolonged the diagnosis of NSCLC, possibly leading to higher tumor stages at first diagnosis. This study aims to identify how COVID-19 affected the distribution of the Union for International Cancer Control (UICC) stage in NSCLC at first diagnosis.

Methods

A retrospective case-control study was conducted, including all patients receiving their first diagnosis of NSCLC in the regions of Leipzig and Mecklenburg-Vorpommern (MV) between January 2019 and March 2021. Patient data were retrieved from the clinical cancer registries of the city of Leipzig and the federal state of MV. Ethical approval for this retrospective evaluation of archived, anonymized patient data was waived by the Scientific Ethical Committee at the Medical Faculty, Leipzig University. Three investigation periods were defined to study the effects of high incidences of SARS-COV-2: the curfew period as an enacted security measure, the period of high incidence rates and the period of the aftermath of high incidences. Differences in the UICC stages between these pandemic periods were studied by Mann-Whitney-U-Test. Pearson's correlation was calculated to examine changes in operability.

Results

The number of patients diagnosed with NSCLC dropped substantially during investigation periods. There was a significant difference in the UICC status in the aftermath of high incidences and imposed security measures in Leipzig (P=0.016). N-status differed significantly in the aftermath of high incidences and imposed security measures (P=0.022) with a decrease of N0- and an increase of N3-status, respectively, while N1- and N2-status remained relatively unaffected. No pandemic phase showed a significant difference in operability.

Conclusions

The pandemic led to a delay in the diagnosis of NSCLC in the two examined regions. This resulted in higher UICC stages upon diagnosis. However, no increase in inoperable stages was shown. It remains to be seen, how this will affect the overall prognosis of the involved patients.

Novel 3D organotypic co-culture model of pleura

Pleural mesothelial cells are the predominant cell type in the pleural cavity, but their role in the pathogenesis of pleural diseases needs to be further elucidated. 3D organotypic models are an encouraging approach for an in vivo understanding of molecular disease development. The aim of the present study was to develop a 3D organotypic model of the pleural mesothelium. Specimens of human pleura parietalis were obtained from patients undergoing surgery at the University Hospital Leipzig, Germany. 3D co-culture model of pleura was established from human pleural mesothelial cells and fibroblasts. The model was compared to human pleura tissue by phase-contrast and light microscopy, immunochemistry and -fluorescence as well as solute permeation test. Histological assessment of the 3D co-culture model displayed the presence of both cell types mimicking the morphology of the human pleura. Vimentin and Cytokeratin, PHD1 showed a similar expression pattern in pleural biopsies and 3D model. Expression of Ki-67 indicates the presence of proliferating cells. Tight junctional marker ZO-1 was found localized at contact zones between mesothelial cells. Each of these markers were expressed in both the 3D co-culture model and human biopsies. Permeability of 3D organotypic co-culture model of pleura was found to be higher for 70 kDa-Dextran and no significant difference was seen in the permeability for small dextran (4 kDa). In summary, the presented 3D organoid of pleura functions as a robust assay for pleural research serving as a precise reproduction of the in vivo morphology and microenvironment.

Isolated open bronchus fracture after open die forging

We present a case of an isolated open bronchus rupture following blunt thoracic trauma. Tracheobronchial injuries (TBI) following blunt chest trauma are a rare but possibly life-threatening condition. Though typically associated with additional injuries, high-energy blunt trauma led to perforating chest wound alone. A bronchial injury has not been seen neither in preoperative CT scan nor intraoperatively. This underlines the strong need for bronchoscopy in chest trauma as the only definitive diagnostic in bronchial lesions.

Procedural times in early non-intubated VATS program - a propensity score analysis

BACKGROUND

Non-intubated video-assisted thoracic surgery (NiVATS) has been introduced to surgical medicine in order to reduce the invasiveness of anesthetic procedures and avoid adverse effects of intubation and one-lung ventilation (OLV). The aim of this study is to determine the time effectiveness of a NiVATS program compared to conventional OLV.

METHODS

This retrospective analysis included all patients in Leipzig University Hospital that needed minor VATS surgery between November 2016 and October 2019 constituting a NiVATS (n = 67) and an OLV (n = 36) group. Perioperative data was matched via propensity score analysis, identifying two comparable groups with 23 patients. Matched pairs were compared via t-Test.

RESULTS

Patients in NiVATS and OLV group show no significant differences other than the type of surgical procedure performed. Wedge resection was performed significantly more often under NiVATS conditions than with OLV (p = 0,043). Recovery time was significantly reduced by 7 min (p = 0,000) in the NiVATS group. There was no significant difference in the time for induction of anesthesia, duration of surgical procedure or overall procedural time.

CONCLUSIONS

Recovery time was significantly shorter in NiVATS, but this effect disappeared when extrapolated to total procedural time. Even during the implementation phase of NiVATS programs, no extension of procedural times occurs.

Utility of immunohistochemical staining for the diagnosis of Extra-adrenal mediastinal paraganglioma

Extra-adrenal, mediastinal paraganglioma are rare tumors that origin from sympathetic ganglia. Common diagnostic steps include CT, MRI and PET-Scan. We present a case where immunohistochemical staining was an essential step for final diagnosis in a patient without symptoms of endocrine activity and an uncommon location of this tumor entity. In combination with clinical particularities on the origin of the tumor and characteristic morphology, the immunohistochemical staining of tumor tissue is a necessary diagnostic tool for paraganglioma.

Single-longitudinal-mode pumped pulsed-dye amplifier for high-resolution laser spectroscopy

The In-Gas-jet Laser Ionization and Spectroscopy (IGLIS) technique relies on narrow-bandwidth, high-peak-power, short-pulse-length (≈10 ns), and high-repetition-rate laser pulses to probe, precisely and efficiently, the hyperfine structure of medium-heavy and heavy isotopes, embedded in a supersonic jet. The power and repetition rate requirements of the laser system are met by combining ≈100 W, 8 ns pulse width, 10 kHz commercial Nd:YAG pump lasers with a single-mode continuous wave seeded Pulsed Dye Amplifier (PDA). The common multi-longitudinal-mode operation of these Nd:YAG pump lasers causes, however, undesirable frequency sidebands in the output spectrum of the PDA system, hindering the attainable spectral resolution, a correct interpretation, and an accurate analysis of the hyperfine spectra. In this article, a new prototype Nd:YAG laser is presented, which combined with the PDA system is capable of providing quasi-transform-limited laser pulses at 10 kHz, with only limited losses in laser power. This system reduces any spectral sideband amplitude below a proven upper limit of 0.2% with one order of magnitude extra reduction expected based on simulations. A full characterization of both the Nd:YAG and PDA laser systems is done by studying the temporal and frequency behavior in detail. This study is finalized by a performance benchmark of this combined laser system in the hyperfine spectroscopy of copper isotopes, showcasing its applicability for future IGLIS studies.

Narrative Matters: Stop running and start thinking

A work discussion group creates space for colleagues both to learn from and support one another. I outline some of the historical events that led to this powerful method of professional development, and how it works today.

The Heidelberg compact electron beam ion traps

Electron beam ion traps (EBITs) are ideal tools for both production and study of highly charged ions (HCIs). In order to reduce their construction, maintenance, and operation costs, we have developed a novel, compact, room-temperature design, the Heidelberg Compact EBIT (HC-EBIT). Four already commissioned devices operate at the strongest fields (up to 0.86 T) reported for such EBITs using permanent magnets, run electron beam currents up to 80 mA, and energies up to 10 keV. They demonstrate HCI production, trapping, and extraction of pulsed Ar¹⁶⁺ bunches and continuous 100 pA ion beams of highly charged Xe up to charge state 29+, already with a 4 mA, 2 keV electron beam. Moreover, HC-EBITs offer large solid-angle ports and thus high photon count rates, e.g., in x-ray spectroscopy of dielectronic recombination in HCIs up to Fe²⁴⁺, achieving an electron-energy resolving power of E/ΔE > 1500 at 5 keV. Besides traditional on-axis electron guns, we have also implemented a novel off-axis gun for laser, synchrotron, and free-electron laser applications, offering clear optical access along the trap axis. We report on its first operation at a synchrotron radiation facility demonstrating the resonant photoexcitation of highly charged oxygen.

The liaison model

This paper puts the case for accessible multidisciplinary mental health services for children and young people to managers, purchasers and GPs, in a framework of national and international statutes and guidance. The essential differences between the disciplines are explained, based on detailed advice from mental health colleagues in nursing, teaching, social work, psychology, child psychotherapy and child and adolescent psychiatry.

Highly functional ellipsoidal block copolymer nanoparticles: a generalized approach to nanostructured chemical ordering in phase separated colloidal particles

Spatially controlled introduction of chemical functionalities into ellipsoidal block copolymer nanoparticles is achieved through pre- and post-assembly strategies.

Punch injury self-harm in young people

Punch injuries are a form of self-harm characterised by the intentional act of striking an object with a closed fist. We aimed to describe the characteristics and trends in young people presenting with injuries sustained via the punch mechanism. A comprehensive retrospective review of medical records was completed of all young people aged 10-18 years presenting to our Central London Emergency Department over a 12-month period. A subset of the total group was identified as the punch injury subgroup. A total of 78 punch injury presentations were identified. In this subgroup, the male:female ratio is 4.57:1; 37.18% of presentations were associated with a fracture ( n = 29) and 35.90% ( n = 28) of patients re-presented following another punch injury, as a victim of violence, or by other psychiatric presentation. In conclusion, a male preponderance was observed, with frequent re-presentations, often in high-risk circumstances. An opportunity for screening, including mental health, social and substance misuse, was identified. Further research is needed to enable targeted effective interventions in this group.

Abstract P1-09-05: The role of immune and apoptosis markers for prediction of pCR in the WSG-ADAPT HER2+/HR+ phase II trial evaluating 12-weeks of neoadjuvant TDM1 ± endocrine therapy (ET) versus T + ET in HER2-positive hormone-receptor-positive early breast cancer (EBC)

Background: Immune and apoptosis biomarkers are potential prognostic/predictive markers in HER2+ EBC. High PD-L1 expression was shown to be predictive for lower pCR after chemotherapy+trastuzumab+/-pertuzumab, particularly in HER2+, ER- disease. Yet, HER2+ EBC co-expressing hormone receptors is a distinct entity.

The ADAPT HER2+/HR+ phase II trial (n=376) compared 12 weeks of neoadjuvant T-DM1 + ET vs. trastuzumab (T)+ET and demonstrated pCR rates of about 41% in both (well tolerated) T-DM1 arms.

Methods: In order to identify potential early predictors for pCR (i.e. no invasive tumor in breast and lymph nodes), immune markers (PDL1 on infiltrating immune cells (IIC) and on tumor cells (TC); CD8 in invasive margin and in tumor center) and apoptosis markers (bcl-2; mcl-2) were determined by immunohistochemistry (IHC; H-scores) in core biopsy sections obtained at primary diagnosis and at cycle 2. For multivariate logistic regression, each biomarker (separately), clinical factors (Ki-67, cT, cN) and therapy were entered. All analyses were exploratory.

Results:Biomarkers were available in up to 326 patients (pts) at baseline and up to 170 pts at 3 weeks (due to low tumor content in 2nd core biopsy).

Baseline IIC-PDL1 was associated with pCR in the T-DM1 arm (OR 2.89; 95%CI: 1.11-7.51); IIC-PDL1 at cycle 2 was not associated with pCR.

PD-L1 expression in TC was rare (2%); cycle-2 TC-PD-L1 was associated with pCR in all pts and in the pooled TDM-1 arms.

High baseline CD8 in tumor center was associated with pCR in the whole cohort (OR 2.4; CI: 1.04 – 5.5) and in the T+ET arm (OR=10.1; CI: 1.12 - 91.6) and at cycle 2 in all pts (OR=9.52; CI: 2.17 – 41), in pooled TDM-1 arms (OR=15.7; CI: 2.49 – 99), and in TDM-1+ET (OR=25.05; CI: 2.12 – 295). Increases in this marker also predicted pCR in all pts, pooled TDM-1, and in TDM-1+ET. Association of cycle-2 CD8 in tumor center with pCR persisted in multivariate models.

Lower baseline CD8 in invasive margin was associated with pCR in the T-DM1 arm (OR=0.09; CI: 0.01-0.69), but at cycle 2 in all pts (OR=18.1; CI: 1.60 – 204) and in pooled TDM-1 arms (OR=23.5; CI: 1.1 - 500). This positive impact persisted in multivariate models.

Bcl-2 expression at baseline was associated with non-pCR in all pts (OR=0.28, CI: 0.12 - 0.66), in the pooled T-DM1 arms (OR=0.216, CI: 0.08 - 0.61), and particularly in the T-DM1+ET arm (OR=0.14; CI: 0.03 - 0.71). This association persisted in multivariate analysis. At cycle 2, lower bcl-2 had OR=0.16 (CI: 0.03 - 0.96) in the pooled T-DM1 arms. No association with efficacy was seen for mcl-1.

Conclusions: The WSG-ADAPT HER2+/HR+ phase II trial is the first international trial to focus on HER2+/HR+ EBC alone and the first to show substantial pCR rates of &gt; 40% after only 12 weeks of T-DM1 -- without standard chemotherapy.

Expression of bcl-2 may affect resistance to T-DM1. High immune activity at baseline and/or cycle 2 seems to be associated with pCR. The association of CD8 expression and its changes with therapy efficacy is complex and could depend on ET.

Further biomarker analyses are ongoing and will be presented at the meeting.

Citation Format: Harbeck N, Nitz UA, Matthias C, Kates R, Braun M, Kümmel S, Schumacher C, Potenberg J, Kraemer S, Kleine-Tebbe A, Augustin D, Aktas B, Forstbauer H, Tio J, Liedtke C, Grischke E-M, de Haas SL, Deurloo R, Schumacher J, Wuerstlein R, Kreipe HH, Gluz O. The role of immune and apoptosis markers for prediction of pCR in the WSG-ADAPT HER2+/HR+ phase II trial evaluating 12-weeks of neoadjuvant TDM1 ± endocrine therapy (ET) versus T + ET in HER2-positive hormone-receptor-positive early breast cancer (EBC) [abstract]. In: Proceedings of the 2016 San Antonio Breast Cancer Symposium; 2016 Dec 6-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2017;77(4 Suppl):Abstract nr P1-09-05.

Abstract P2-07-01: Association of TILs with clinical parameters, recurrence score, and prognosis in patients with early HER2-negative breast cancer (BC) – A translational analysis of the prospective WSG planB trial

Introduction:

Tumor-infiltrating lymphocytes (TILs) have been associated with prognosis and with chemotherapy response among patients with BC, particularly in presence of high-risk features. The WSG planB trial randomized 2448 patients with HER2- N0/1 BC for comparison of anthracycline-free (6xTC) vs. standard anthracycline-taxane chemotherapy (4xEC-4xDoc). Recurrence Score® (RS) was incorporated for risk stratification in hormone receptor positive (HR+) BC. The present analysis focuses on the correlation of TILs with clinical/pathological parameters and their prognostic impact among planB patients.

Methods:

Stromal TILs were evaluated using a pathologist and two-observer approach. Three independent observers evaluated digital sections on H&E staining as previously suggested (Salgado et al., Ann Oncol. 2014); the median of the three values (TILmed) was used for statistical analysis. Spearman correlations of TILmed with clinical/pathological parameters (including central KI67 expression, quantitative ER measurements, nodal involvement, and RS) and univariate impact on event-free survival (EFS) were analyzed.

Results:

Our analysis included 300 patients with HR- and 1124 patients with HR+ HER2- BC. Both in HR- and HR+ BC, a significant association between TILmed and (i) central grading (correlation coefficient r=0.147, p=0.012 and r=0.195, p&lt;0.001, respectively) and (ii) central Ki67 expression (r=0.202, p=0.001 and r=0.152 and p&lt;0.001) was observed. Among HR+ cases, a significant association between TILmed and quantitative ER measurements (r=-0.412, p=0.041) and RS (r=0.190, p&lt;0.001) was found. Furthermore, univariate Cox analysis revealed a significant association between TILmed (coded as fractional rank) and event-free survival (EFS). The hazard ratio of 75th to 25th percentile was 1.58 (95%CI: 1.06-2.36, p=0.025). This impact was not separately significant in HR subgroups due to lack of events

Conclusion:

In this dataset, presence of stromal TILs was moderately associated with clinical features of high-risk breast cancer (including RS) and decreased EFS. TILs will be evaluated as a prognostic or predictive factor (in multivariate and subgroup analyses) when the outcome results are evaluated after prolonged follow up. Furthermore, an updated analysis including the complete planB dataset will be presented.

Citation Format: Liedtke C, Gluz O, Heinisch F, Feuerhake F, Kreipe HH, Clemens M, Nuding B, Kraemer S, Reimer T, Svedman C, Shak S, Nitz U, Kates RE, Harbeck N, Christgen M. Association of TILs with clinical parameters, recurrence score, and prognosis in patients with early HER2-negative breast cancer (BC) – A translational analysis of the prospective WSG planB trial. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P2-07-01.