Characterization of PPS Piston and Packing Ring Materials for High-Pressure Hydrogen Applications.

The widespread adoption of renewable energy hinges on the efficient transportation of hydrogen. Reciprocating piston compressor technology in non-lubricated operation will play a key role, ensuring high flow rates and compression ratios. These systems rely on advanced high-strength sealing solutions for piston and rod packing rings utilizing advanced fiber-reinforced polymers. Polyphenylene sulfide (PPS) polymer matrix composites have seen use in tribological applications and promise high mechanical strength and wear resistance. The presented work describes carbon and glass fiber-reinforced PPS matrix polymers in comparison, which are characterized by complementary methods to investigate their properties and potential for application in reciprocating compressor under non-lubricated operation. Thermo-mechanical and tribological testing was supported by microstructure analysis utilizing advanced X-ray and electron imaging techniques. New insights in micromechanical deformation behavior in regard to fiber materials, interface strength and orientation in fiber-reinforced polymers are given. Conclusions on the suitability of different PPS matrix composites for high-pressure hydrogen compression applications were obtained.

A prognostic score for non-small cell lung cancer resected after neoadjuvant therapy in comparison with the tumor-node-metastases classification and major pathological response.

Studies validating the prognostic accuracy of the tumor-node-metastases (TNM) classification in patients with lung cancer treated by neoadjuvant therapy are scarce. Tumor regression, particularly major pathological response (MPR), is an acknowledged prognostic factor in this setting. We aimed to validate a novel combined prognostic score. This retrospective single-center study was conducted on 117 consecutive patients with non-small cell lung cancer resected after neoadjuvant treatment at a Swiss University Cancer Center between 2000 and 2016. All cases were clinicopathologically re-evaluated. We assessed the prognostic performance of a novel prognostic score (PRSC) combining T-category, lymph node status, and MPR, in comparison with the eighth edition of the TNM classification (TNM8), the size adapted TNM8 as proposed by the International Association for the Study of Lung Cancer (IASLC) and MPR alone. The isolated ypT-category and the combined TNM8 stages accurately differentiated overall survival (OS, stage p = 0.004) and disease-free survival (DFS, stage p = 0.018). Tumor regression had a prognostic impact. Optimal cut-offs for MPR emerged as 65% for adenocarcinoma and 10% for non-adenocarcinoma and were statistically significant for survival (OS p = 0.006, DFS p < 0.001). The PRSC differentiated between three prognostic groups (OS and DFS p < 0.001), and was superior compared to the stratification using MPR alone or the TNM8 systems, visualized by lower Akaike (AIC) and Bayesian information criterion (BIC) values. In the multivariate analyses, stage III tumors (HR 4.956, p = 0.003), tumors without MPR (HR 2.432, p = 0.015), and PRSC high-risk tumors (HR 5.692, p < 0.001) had significantly increased risks of occurring death. In conclusion, we support 65% as the optimal cut-off for MPR in adenocarcinomas. TNM8 and MPR were comparable regarding their prognostic significance. The novel prognostic score performed distinctly better regarding OS and DFS.

Autochthonous Case of Pulmonary Histoplasmosis, Switzerland.

In Europe, pulmonary histoplasmosis is rarely diagnosed except in travelers. We report a probable autochthonous case of severe chronic pulmonary histoplasmosis in an immunocompetent man in Switzerland without travel history outside of Europe. Diagnosis was achieved by histopathology, fungal culture, and serology, but the source of the infection remains speculative.

[The multidisciplinary discussion-the gold standard in diagnosing interstitial lung diseases]. / Multidisziplinäre Diskussion ­ der Goldstandard der Diagnostik interstitieller Lungenerkrankungen.

Interstitial lung diseases present clinically with unspecific respiratory symptoms and occur idiopathically or etiologically linked to various causes. The morphology of interstitial lung diseases (radiology or histopathology) may also be unspecific in the individual case, due to the limited arsenal of reaction patterns of the lungs. Only the combination of all findings assembled during multidisciplinary discussion (MDD) between pulmonologist, radiologist and pathologist, and if required other specialties, enables a highly reliable final diagnosis, permitting improved, personalized patient treatment. The necessity for histological evaluation and the means of tissue acquisition should also be decided on during MDD, considering clinical and radiological differential diagnoses, the risks involved in the procedures and patient-specific characteristics. In the current review, we discuss MDD as the diagnostic gold standard and exemplify its merit presenting a case of interstitial lung disease.

[Diagnostics of interstitial lung diseases in the multidisciplinary team]. / Diagnostik interstitieller Lungenerkrankungen im multidisziplinären Team.

Diagnostics of interstitial lung diseases in the multidisciplinary team Abstract. Interstitial lung diseases present clinically with unspecific respiratory symptoms and can either be attributed to various causes or occur idiopathically. The final diagnosis should be set after multidisciplinary discussion (MDD) between pulmonologist, radiologist and pathologist. Pathology provides results of bronchoalveolar lavage, transbronchial forceps biopsies, cryobiopsies and most importantly surgical lung biopsies (so called wedge-biopsies). The indication for the acquisition of tissue for pathological investigation and the technique chosen depend on the radiological picture and the suspected diagnosis. Indication and technique of biopsy should also be determined in the MDD. In the present review, we will exemplify the value and necessity of the interdisciplinary approach on selected entities of interstitial lung diseases.

Fatal Measles Virus Infection After Rituximab-Containing Chemotherapy in a Previously Vaccinated Patient.

We report the case of a young patient treated with rituximab-containing chemotherapy who was infected with measles despite previous vaccination. Treatment with vitamin A, ribavirin, and immunoglobulins was started; nevertheless he developed severe pneumonitis and deceased. Broad vaccination coverage is crucial in protecting vulnerable subjects.

Idiopathic pulmonary fibrosis in a Swiss interstitial lung disease reference centre.

BACKGROUND: Idiopathic pulmonary fibrosis (IPF) differs substantially from other idiopathic interstitial pneumonias regarding disease trajectory and the appropriate management strategies, making meticulous diagnosis essential. However, patient characteristics and clinical practice vary between clinical trials, and real life and registries provide the opportunity to critically analyse current clinical practices in order to ultimately improve patient care. METHODS: We aimed to identify characteristics of our baseline IPF cohort at initiation of a web-based registry for patients with idiopathic interstitial pneumonia. Baseline and 6-month follow-up data from all consecutive IPF patients consulting at our centre over 2 years were analysed. RESULTS: Forty IPF patients were included for baseline and 23 for longitudinal analysis. Besides many similarities to other IPF populations, our cohort included considerably fewer women. Forced vital capacity impairment in our cohort was more severe and mortality prediction poorer than in clinical trials, which emphasises the importance to confirm the applicability of clinical trial results with data from real life settings. CONCLUSION: Registries for rare diseases such as IPF are a valuable resource for studying the course of the disease under current compliance with diagnostic and treatment guidelines and to appreciate local epidemiological particularities.

Functional Implications of LH/hCG Receptors in Pregnancy-Induced Cushing Syndrome.

CONTEXT: Elevated human choriogonadotropin (hCG) may stimulate aberrantly expressed luteinizing hormone (LH)/hCG receptor (LHCGR) in adrenal glands, resulting in pregnancy-induced bilateral macronodular adrenal hyperplasia and transient Cushing syndrome (CS). OBJECTIVE: To determine the role of LHCGR in transient, pregnancy-induced CS. DESIGN SETTING PATIENT AND INTERVENTION: We investigated the functional implications of LHCGRs in a patient presenting, at a tertiary referral center, with repeated pregnancy-induced CS with bilateral adrenal hyperplasia, resolving after parturition. MAIN OUTCOME MEASURES AND RESULTS: Acute testing for aberrant hormone receptors was negative except for arginine vasopressin (AVP)-increased cortisol secretion. Long-term hCG stimulation induced hypercortisolism, which was unsuppressed by dexamethasone. Postadrenalectomy histopathology demonstrated steroidogenically active adrenocortical hyperplasia and ectopic cortical cell clusters in the medulla. Quantitative polymerase chain reaction showed upregulated expression of LHCGR, transcription factors GATA4, ZFPM2, and proopiomelanocortin (POMC), AVP receptors (AVPRs) AVPR1A and AVPR2, and downregulated melanocortin 2 receptor (MC2R) vs control adrenals. LHCGR was localized in subcapsular, zona glomerulosa, and hyperplastic cells. Single adrenocorticotropic hormone-positive medullary cells were demonstrated in the zona reticularis. The role of adrenal adrenocorticotropic hormone was considered negligible due to downregulated MC2R. Coexpression of CYP11B1/CYP11B2 and AVPR1A/AVPR2 was observed in ectopic cortical cells in the medulla. hCG stimulation of the patient's adrenal cell cultures significantly increased cyclic adenosine monophosphate, corticosterone, 11-deoxycortisol, cortisol, and androstenedione production. CTNNB1, PRKAR1A, ARMC5, and PRKACA gene mutational analyses were negative. CONCLUSION: Nongenetic, transient, somatic mutation-independent, pregnancy-induced CS was due to hCG-stimulated transformation of LHCGR-positive undifferentiated subcapsular cells (presumably adrenocortical progenitors) into LHCGR-positive hyperplastic cortical cells. These cells respond to hCG stimulation with cortisol secretion. Without the ligand, they persist with aberrant LHCGR expression and the ability to respond to the same stimulus.

[Interstitial pneumonias--Histopathological and radiological correlation]. / Histopathologische und radiologische Korrelationen.

Interstitial pneumonias comprise a group of lung diseases with overlapping clinical, radiological and pathological presentations. Because of the frequently non-discriminating clinical manifestation, correlation between radiology and pathology plays an important role. Multidisciplinary discussion is of utmost importance for establishing a valid diagnosis, and is considered a gold standard in the current 2002/2013 classification of idiopathic interstitial pneumonias. In the present work, we concisely review and illustrate the typical radiological and pathological pictures diagnostic for the most common (idiopathic) interstitial pneumonias.

A rare case of ovarian cancer in pregnancy complicated by pulmonary embolus and myocardial infarction: management dilemmas.

Malignant ovarian neoplasms diagnosed during pregnancy at advanced stages are very rare. The clinical course and prognosis of pregnant patients diagnosed with epithelial ovarian cancer is similar to that of non-pregnant patients. We describe our management of a woman diagnosed with FIGO IIIc ovarian cancer at Caesarean section. Immediately after surgery she suffered a pulmonary embolus and a myocardial infarction. She showed signs of a severe pulmonary hypertension (59 mmHg). Four weeks later the pulmonary hypertension was still moderate but, despite her critical status, she underwent primary debulking surgery (PDS). This was performed under extensive anaesthesiological monitoring. Through this rare case, we show that despite the complex initial status of a critically ill patient, PDS can still remain the mainstay of treatment in patients with advanced ovarian cancer as most patients are able to tolerate even extensive debulking surgery without the need for neoadjuvant chemotherapy.

Reducing Radiation Dose in Emergency CT Scans While Maintaining Equal Image Quality: Just a Promise or Reality for Severely Injured Patients?

Objective. This study aims to assess the impact of adaptive statistical iterative reconstruction (ASIR) on CT imaging quality, diagnostic interpretability, and radiation dose reduction for a proven CT acquisition protocol for total body trauma. Methods. 18 patients with multiple trauma (ISS ≥ 16) were examined either with a routine protocol (n = 6), 30% (n = 6), or 40% (n = 6) of iterative reconstruction (IR) modification in the raw data domain of the routine protocol (140 kV, collimation: 40, noise index: 15). Study groups were matched by scan range and maximal abdominal diameter. Image noise was quantitatively measured. Image contrast, image noise, and overall interpretability were evaluated by two experienced and blinded readers. The amount of radiation dose reductions was evaluated. Results. No statistically significant differences between routine and IR protocols regarding image noise, contrast, and interpretability were present. Mean effective dose for the routine protocol was 25.3 ± 2.9 mSv, 19.7 ± 5.8 mSv for the IR 30, and 17.5 ± 4.2 mSv for the IR 40 protocol, that is, 22.1% effective dose reduction for IR 30 (P = 0.093) and 30.8% effective dose reduction for IR 40 (P = 0.0203). Conclusions. IR does not reduce study interpretability in total body trauma protocols while providing a significant reduction in effective radiation dose.

Sunitinib in refractory adrenocortical carcinoma: a phase II, single-arm, open-label trial.

CONTEXT: Treatment of refractory adrenocortical carcinoma (ACC) is not established. Animal experiments pointed toward adrenal toxicity of sunitinib. OBJECTIVE: The objective of the study was to determine the antitumor effects of sunitinib in refractory ACC. DESIGN: This was a phase II, open-label trial using a two-stage accrual design. SETTING: The study was conducted at two tertiary referral centers. PATIENTS: Thirty-eight patients with refractory ACC progressing after mitotane and one to three cytotoxic chemotherapies participated in the study. INTERVENTION: The intervention included sunitinib at a standard dose (50 mg/d, 4 wk on, 2 wk off). MAIN OUTCOME MEASURE: Response was defined as progression-free survival (PFS) of 12 wk or longer (first tumor evaluation). RESULTS: Thirty-five patients could be evaluated for response. Five patients experienced stable disease, 24 had progressive disease, and six patients died from ACC before the first evaluation (naïve estimate five of 35=14.3%, median unbiased response rate 15.4%, 95% confidence interval 5.0-33.4%). The median PFS was 2.8 months. In responders, PFS ranged between 5.6 and 11.2 months and overall survival between 14.0 and 35.5 months. Of 36 serious adverse events, only nine were possibly related to sunitinib. Concomitant mitotane appeared to negatively impact on outcome. Furthermore, a negative correlation between the serum concentrations of sunitinib plus its active metabolite N-desethylsunitinib (SU12662) and mitotane (r=-0.650; P=0.114) was observed in seven evaluable patients suggestive of a relevant drug interaction. CONCLUSION: Sunitinib has modest activity in advanced refractory ACC, which compares favorably with other targeted treatments in these patients. Sunitinib serum levels might have been profoundly reduced by mitotane induced cytochrome P450-3A4 activity attenuating its antitumor activity and adverse effects. Together these findings suggest that sunitinib deserves further investigation in mitotane-naïve ACC patients.

Development of low-dose photon-counting contrast-enhanced tomosynthesis with spectral imaging.

PURPOSE: To demonstrate the feasibility of low-dose photon-counting tomosynthesis in combination with a contrast agent (contrast material-enhanced tomographic mammography) for the differentiation of breast cancer. MATERIALS AND METHODS: All studies were approved by the institutional review board, and all patients provided written informed consent. A phantom model with wells of iodinated contrast material (3 mg of iodine per milliliter) 1, 2, 5, 10, and 15 mm in diameter was assessed. Nine patients with malignant lesions and one with a high-risk lesion (atypical papilloma) were included (all women; mean age, 60.7 years). A multislit photon-counting tomosynthesis system was utilized (spectral imaging) to produce both low- and high-energy tomographic data (below and above the k edge of iodine, respectively) in a single scan, which allowed for dual-energy visualization of iodine. Images were obtained prior to contrast material administration and 120 and 480 seconds after contrast material administration. Four readers independently assessed the images along with conventional mammograms, ultrasonographic images, and magnetic resonance images. Glandular dose was estimated. RESULTS: Contrast agent was visible in the phantom model with simulated spherical tumor diameters as small as 5 mm. The average glandular dose was measured as 0.42 mGy per complete spectral imaging tomosynthesis scan of one breast. Because there were three time points (prior to contrast medium administration and 120 and 480 seconds after contrast medium administration), this resulted in a total dose of 1.26 mGy for the whole procedure in the breast with the abnormality. Seven of 10 cases were categorized as Breast Imaging Reporting and Data System score of 4 or higher by all four readers when reviewing spectral images in combination with mammograms. One lesion near the chest wall was not captured on the spectral image because of a positioning problem. CONCLUSION: The use of contrast-enhanced tomographic mammography has been demonstrated successfully in patients with promising diagnostic benefit. Further studies are necessary to fully assess diagnostic sensitivity and specificity.

Evaluation of contrast-enhanced digital mammography.

PURPOSE: The goal of this prospective study was to evaluate the possible diagnostic benefits of contrast-enhanced digital mammography (CEDM) over conventional mammography. MATERIALS AND METHODS: Our analysis included data from 70 patients with a total of 80 lesions (30 malignant and 50 benign). A series of contrast-enhanced images was acquired from each patient using a modified imaging system (GE Senographe 2000D with copper filter) suitable for displaying iodine contrast medium. After the mask image had been taken, the contrast medium was administered using a dosage of 1ml/kg body weight at a rate of 4ml/s. Three contrast-enhanced images in the cranio-caudal projection plane were then captured at intervals of 60s. The mask image was logarithmically subtracted from the contrast-enhanced images. We performed a ROC analysis of diagnostic quality with three readers. RESULTS: On average, 5.66 more malignant lesions were detected with the addition of digital dynamic contrast mammography versus conventional mammography alone. The sensitivity was increased from an average of 0.43 in conventional mammography to an average of 0.62 with contrast mammography. Even in dense breast parenchyma, the sensitivity increased from an average of 0.35-0.59. In the multi-reader-ROC analyses of all readers, the differences in the AUC with p=0.02 (BI-RADS) proved statistically significant in all cases. The Wilcoxon test showed that Readers I and II primarily used the CEDM to upgrade enhancing lesions to a higher BI-RADS category or a higher probability of malignancy. These two readers benefited most from the CEDM in the ROC analysis. CONCLUSION: Overall, we conclude that the addition of dynamic digital subtraction mammography to conventional mammography can significantly improve diagnostic quality. The increased sensitivity is particularly pronounced in the case of dense breast tissue.