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31.
Case report : congenital extrahepatic portocaval shunt presenting as pulmonary arterial hypertension in a pregnant patient
Matevž Harlander, Maja Badovinac, Frosina Markoska, Barbara Salobir, Tomaž Štupnik, Marija Dolenšek, Izidor Kern, Vojka Gorjup, Nazzareno Galiè, 2022

Povzetek: Congenital extrahepatic portocaval shunt (CEPS) is a rare condition in which a rare congenital vascular anomaly of the portal system is present. CEPS may manifest as pulmonary arterial hypertension (PAH). When diagnosed and treated early, PAH can be reversible. We report a case of a previously asymptomatic woman, who manifested with severe pulmonary hypertension during pregnancy and was consequently diagnosed with CEPS. After unsuccessful medical treatment, urgent lung transplantation was done.
Ključne besede: pulmonary hypertension, pregnancy, congenital extrahepatic portocaval shunt, Abernethy malformation, pulmonary arterial hypertension
DiRROS - Objavljeno: 10.01.2022; Ogledov: 186; Prenosov: 102
.pdf Celotno besedilo (883,93 KB)

32.
Covid-19 pulmonary pathology : the experience of European pulmonary pathologists throughout the first two waves of the pandemic
Francesco Fortarezza, Federica Pezzuto, Paul Hofman, Izidor Kern, Angel Panizo, Jan von der Thüsen, Sergei Timofeev, Gregor Gorkiewicz, Sabina Berezowska, Laurence de Level, Cristian Ortiz-Villalón, Francesca Lunardi, Fiorella Calabrese, 2022

Povzetek: Autoptic studies of patients who died from COVID-19 constitute an important step forward in improving our knowledge in the pathophysiology of SARS-CoV-2 infection. Systematic analyses of lung tissue, the organ primarily targeted by the disease, were mostly performed during the first wave of the pandemic. Analyses of pathological lesions at different times offer a good opportunity to better understand the disease and how its evolution has been influenced mostly by new SARS-CoV-2 variants or the different therapeutic approaches. In this short report we summarize responses collected from a questionnaire survey that investigated important pathological data during the first two pandemic waves (spring-summer 2020; autumn-winter 2020–2021). The survey was submitted to expert lung pathologists from nine European countries involved in autoptic procedures in both pandemic waves. The frequency of each lung lesion was quite heterogeneous among the participants. However, a higher frequency of pulmonary superinfections, both bacterial and especially fungal, was observed in the second wave compared to the first. Obtaining a deeper knowledge of the pathological lesions at the basis of this complex and severe disease, which change over time, is crucial for correct patient management and treatment. Autoptic examination is a useful tool to achieve this goal.
Ključne besede: COVID-19, SARS-CoV-2, autopsy, lung - pathology, pulmonary aspergillosis
DiRROS - Objavljeno: 13.01.2022; Ogledov: 251; Prenosov: 126
.pdf Celotno besedilo (2,30 MB)

33.
Heterogeneous response of airway eosinophilia to anti-IL-5 biologics in severe asthma patients
Maruša Kopač, Matija Rijavec, Peter Korošec, Urška Bidovec, Izidor Kern, Romana Vantur, Sabina Škrgat, 2022

Povzetek: Many questions concerning responders (R) and nonresponders (NR) in severe eosinophilic asthma (SEA) after blocking the IL-5 (interleukin 5) pathway are still not clear, especially regarding the early parameters of response to biologics in personalized treatment strategies. We evaluated 17 SEA patients treated with anti-IL-5 biologics (16 patients mepolizumab, one patient benralizumab) before the introduction of biologics, and at a week 16 follow-up. Clinical, cellular and immunological parameters in peripheral blood were measured in R and NR. Sputum induction with the measurement of cellular and immunological parameters was performed at 16 weeks only. There were 12 R and 5 NR to biologics. After 16 weeks, there was a significant improvement in percentages of FEV1 (p = 0.001), and asthma control test (ACT) (p = 0.001) in the R group, but not in NR. After 16 weeks, the eosinophils in induced sputum were 27.0% in NR and 4.5% in R (p = 0.05), with no difference in IL-5 concentrations (p = 0.743). Peripheral eosinophilia decreased significantly in NR (p = 0.032) and R (p = 0.002). In patients with SEA on anti-IL-5 therapy, there was a marked difference in airway eosinophilic inflammation between R and NR already at 16 weeks, after anti-IL-5 introduction.
DiRROS - Objavljeno: 13.01.2022; Ogledov: 227; Prenosov: 114
.pdf Celotno besedilo (805,99 KB)

34.
COVID-19 pandemic impact on cytopathology practice in the post-lockdown period : an international, multicenter study
Elena Vigliar, Pasquale Pisapia, Filippo Dello Iacovo, Izidor Kern, William C. Faquin, Martha Bishop Pitman, 2022

Povzetek: Background. In a previous worldwide survey, the authors showed a drastic reduction in the number of cytological specimens processed during the coronavirus disease 2019 “lockdown” period along with an increase in malignancy rates. To assess the continued impact of the pandemic on cytological practices around the world, they undertook a second follow-up worldwide survey collecting data from the post-lockdown period (2020). Methods. Participants were asked to provide data regarding their cytopathology activity during the first 12 weeks of their respective national post-lockdown period (2020), which ranged from April 4 to October 31. Differences between the post-lockdown period and the corresponding 2019 period were evaluated, and the authors specifically focused on rates of malignant diagnoses. Results. A total of 29 respondents from 17 countries worldwide joined the survey. Overall, a lower number of cytological specimens (n = 236,352) were processed in comparison with the same period in 2019 (n = 321,466) for a relative reduction of 26.5%. The overall malignancy rate showed a statistically significant increase (12,442 [5.26%] vs 12,882 [4.01%]; P < .001) during the same time period. Similar results were obtained if both malignancy and suspicious for malignancy rates were considered together (15,759 [6.58%] vs 16,011 [4.98%]; P < .001). Conclusions. The data showed a persistent reduction in the cytological specimen volume during the post-lockdown period (2020). However, the relative increase in the cytological workload in the late part of the post-lockdown is a promising finding of a slow return to normality.
Ključne besede: covid-19, neoplasms, early detection of cancer, lung -- pathology -- cytology, diagnostic screening programs, fine-needle biopsy, cytopathology, fine-needle aspiration, malignancy rate
DiRROS - Objavljeno: 07.02.2022; Ogledov: 142; Prenosov: 30

35.
Utility of telomerase gene mutation testing in patients with idiopathic pulmonary fibrosis in routine practice
Julij Šelb, Katarina Osolnik, Izidor Kern, Peter Korošec, Matija Rijavec, 2022

Povzetek: Recent studies have suggested that causative variants in telomerase complex genes (TCGs) are present in around 10% of individuals with idiopathic pulmonary fibrosis (IPF) regardless of family history of the disease. However, the studies used a case-control rare variant enrichment study design which is not directly translatable to routine practice. To validate the prevalence results and to establish the individual level, routine clinical practice, and utility of those results we performed next generation sequencing of TCGs on a cohort of well-characterized consecutive individuals with IPF (diagnosis established according to ATS/ERS/JRS/ALAT guidelines). Of 27 IPF patients, three had a family history of idiopathic interstitial pneumonia (familial IPF) and 24 did not (sporadic IPF). Pathogenic/likely-pathogenic variants (according to American College of Medical Genetics criteria) in TCG were found in three individuals (11.1%) of the whole cohort; specifically, they were present in 2 out of 24 (8.3%) of the sporadic and in 1 out of 3 (33.3%) of the patients with familial IPF. Our results, which were established on an individual-patient level study design and in routine clinical practice (as opposed to the case-control study design), are roughly in line with the around 10% prevalence of causative TCG variants in patients with IPF.
Ključne besede: telomerase, idiopathic pulmonary fibrosis, genetic variation, telomerase complex
DiRROS - Objavljeno: 07.02.2022; Ogledov: 182; Prenosov: 62
.pdf Celotno besedilo (236,11 KB)

36.
Expression patterns and prognostic relevance of subtype-specific transcription factors in surgically resected small cell lung cancer : an international multicenter study
Zsolt Megyesfalvi, Nandor Barany, Andras Lantos, Zsuzsanna Valko, Orsolya Pipek, Christian Lang, Anna Schwendenwein, Felicitas Oberndorfer, Sandor Paku, Bence Ferencz, Izidor Kern, Mile Kovačević, Viktoria Laszlo, Balazs Dome, 2022

Povzetek: The tissue distribution and prognostic relevance of subtype-specific proteins (ASCL1, NEUROD1, POU2F3, YAP1) present an evolving area of research in small cell lung cancer (SCLC). The expression of subtype-specific transcription factors and P53 and RB1 proteins were measured by immunohistochemistry (IHC) in 386 surgically resected SCLC samples. Correlations between subtype-specific proteins and in vitro efficacy of various therapeutic agents were investigated by proteomics and cell viability assays in 26 human SCLC cell lines. Besides SCLC-A (ASCL1-dominant), SCLC-AN (combined ASCL1/NEUROD1), SCLC-N (NEUROD1-dominant) and SCLC-P (POU2F3-dominant), IHC and cluster analyses identified a quadruple-negative SCLC subtype (SCLC-QN). No unique YAP1-subtype was found. The highest overall survival rates were associated with non-neuroendocrine subtypes (SCLC-P and SCLC-QN) and the lowest with neuroendocrine subtypes (SCLC-A, SCLC-N, SCLC-AN). In univariate analyses, high ASCL1 expression was associated with poor prognosis and high POU2F3 expression with good prognosis. Notably, high ASCL1 expression influenced survival outcomes independently of other variables in a multivariate model. High POU2F3 and YAP1 protein abundances correlated with sensitivity and resistance to standard-of-care chemotherapeutics, respectively. Specific correlation patterns were also found between the efficacy of targeted agents and subtype-specific protein abundances. In conclusion, we have investigated the clinicopathological relevance of SCLC molecular subtypes in a large cohort of surgically resected specimens. Differential IHC expression of ASCL1, NEUROD1 and POU2F3 defines SCLC subtypes. No YAP1-subtype can be distinguished by IHC. High POU2F3 expression is associated with improved survival in a univariate analysis, whereas elevated ASCL1 expression is an independent negative prognosticator. Proteomic and cell viability assays of human SCLC cell lines reveal distinct vulnerability profiles defined by transcription regulators.
Ključne besede: Non-small-cell lung carcinoma, immunohistochemistry, molecular subtypes, prognostic relevance, expression pattern, neuroendocrine subtypes
DiRROS - Objavljeno: 27.05.2022; Ogledov: 5; Prenosov: 3
.pdf Celotno besedilo (4,37 MB)

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