Browsing by Author "Zeren, Handan"

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Ciliated muconodular papillary tumor masked by COVID-19 infection and aspergilloma
(BAYCINAR MEDICAL PUBL-BAYCINAR TIBBI YAYINCILIK, 2022-01-01) Cosgun, Tugba; Zeren, Handan; Kocatuerk, Celalettin
Novel coronavirus disease-2019 (COVID-19) continues to pose a threat all over the world with the effect of new variants. The frequency of other secondary infections such as aspergilloma in patients with COVID-19 disease is not uncommon. Extremely rare lesions such as ciliated muconodular papillary tumor can be masked by radiological images caused by COVID-19 infection or secondary pathologies associated with it, leading to difficulties in diagnosis. Herein, we report a case in whom a diagnosis of aspergilloma and ciliated muconodular papillary tumor after six months of COVID-19 infection was made.
EML4-ALK-positive lung adenocarcinoma presenting an unusual metastatic pattern in a 29-year-old woman who is alive and well in her third year follow up: A case report
(ELSEVIER SCIENCE BV, 2017-01-01) Tokat, Fatma; Zeren, Handan; Barut, Pinar; Tansan, Sualp; Ince, Umit
Non-small cell lung cancer (NSCLC) is a frequent tumor entity with high mortality. Although several newly discovered chromosomal translocations and mutations opened new horizons for targeted therapy, literature still lacks large series of NSCLC with chromosomal abberations and their correlations with histological and clinical features. We present a case of echinoderm microtubule-associated protein-like 4-anaplastic lymphoma kinase (EML4-ALK) translocation positive adenocarcinoma of the lung with an unusual metastatic pattern in a 29-year-old young woman. Conclusion: Young adult non-smoker female patients with an unexplained pleural effusion and signs of metastatic disease should alert the physicians straight away for all types of malignancies including lung cancer. Any skin lesions should be evaluated carefully, biopsies should be done to exclude metastasis in urgency. On the other hand, an uncommon clinical presentation of a lung cancer requires corresponding molecular testing rapidly in order to offer the best treatment option. (C) 2017 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license.
Interobserver Agreement Among Histological Patterns and Diagnosis in Lung Adenocarcinomas
(DE GRUYTER OPEN LTD, 2014-01-01) Urer, Halide Nur; Ahiskali, Rengin; Arda, Naciye; Batur, Sebnem; Cinel, Leyla; Dekan, Gerhard; Fener, Neslihan; Firat, Pinar; Geleff, Silvana; Oz, Buge; Ozluk, Yasemin; Yildiz, Kursat; Yilmazbayhan, Emine Dilek; Zeren, Handan; Uysal, Atilla
Objective: The aim of this study was to investigate the interobserver agreement in determination of the dominant histological pattern and the final diagnosis in lung adenocarcinomas. Material and Method: A total of 12 patients with a diagnosis of primary lung adenocarcinoma were included in the study. Twelve pathologists from eight study centers were asked first to determine the dominant histological pattern in these cases and then to decide whether the final diagnosis was in situ, minimally invasive or invasive adenocarcinoma. Results: The kappa value for the agreement in determining the dominant pattern among the pathologists was 0.36 (p< 0.001), with the values for the lepidic, acinar, papillary, solid, micropapillary patterns and mucinous character of adenocarcinoma being 0.34, 0.28, 0.30, 0.80, 0.16 and 0.38 respectively (p< 0.001, p< 0.001, p< 0.001, p< 0.001, p< 0.001, p< 0.001). None of the cases was diagnosed as in situ adenocarcinoma. On the other hand, the kappa value for the agreement in differentiating minimally invasive from invasive adenocarcinoma among reviewers was 0.17 (p< 0.001). Conclusion: The agreement among pathologists in determining the subtype of lung adenocarcinomas that depends on the identification of the dominant pattern was at intermediate level. In addition, the agreement in deciding whether the case is minimally invasive or invasive, was at low level. The criteria defining the histological patterns should be clarified and described in more detail. Educational activities and larger multicenter studies might be helpful in improving the agreement and standardization.
The importance of histological patterns on PD-L1 staining heterogeneity: Should we use pattern-based approach for selecting tumor samples for PD-L1 testing in lung
(TUBITAK SCIENTIFIC \& TECHNICAL RESEARCH COUNCIL TURKEY, 2021-01-01) Bulutay, Pinar; Firat, Pinar; Zeren, Handan; Erus, Suat; Tanju, Serhan; Dilege, Sukru
Background/aim: Programmed death ligand-1 (PD-L1) is a predictive marker for immunotherapeutic agents. However, heterogeneous staining of PD-L1 can cause false-negative results. The aim of this study is to evaluate the importance of histological patterns on PD-L1 staining heterogeneity in lung adenocarcinomas (LAC). Materials and methods: PD-L1 immunohistochemistry (IHC) stain was performed to two different tissue cores of 128 LAC cases, and cut-off values are given for grouping the cases according to the percentage of staining (1\%-10\%, 11\%-49\%, 50\%-100\%). Staining rates between cores were compared and analyzed by their histological patterns. Also, the relation of the PD-L1 expression with the clinicopathological characteristics of the cases was analyzed. Results: Overall, PD-L1 expression was observed in 53 of 128 cases (41.4\%, 1\% cut-off), 23.5\% of them were positive at 10\% cut-off and 14.1\% at 50\% cut-off. PD-L1 expression was significantly related to the high grade micropapillary and solid patterns of adenocarcinomas (p:0.01). Staining cut-offs were mostly similar between cores (43/50, 86\%) (k:0.843). However, 14\% of them were positive only in one core (7 of 50). This false negativity was mostly related to the histological patterns. Conclusion: Our data reveal the heterogeneous staining of PD-L1 expression, also micropapillary and solid patterns show higher rates of PDL expression. Therewithal, these findings also highlight the importance of taking into consideration of histological patterns, when choosing a paraffin block for the PDL1.