Person: BAĞCI ÇULÇİ, PELİN
Loading...
Email Address
Birth Date
Research Projects
Organizational Units
Job Title
Last Name
BAĞCI ÇULÇİ
First Name
PELİN
Name
9 results
Search Results
Now showing 1 - 9 of 9
Publication Open Access Pancreatic Ductal Adenocarcinoma is Spread to the Peripancreatic Soft Tissue in the Majority of Resected Cases, Rendering the AJCC T-Stage Protocol (7th Edition) Inapplicable and Insignificant: A Size-Based Staging System (pT1: <= 2, pT2: > 2-<= 4, pT3: > 4 cm) is More Valid and Clinically Relevant(SPRINGER, 2016-06) BAĞCI ÇULÇİ, PELİN; Saka, Burcu; Balci, Serdar; Basturk, Olca; Bagci, Pelin; Postlewait, Lauren M.; Maithel, Shishir; Knight, Jessica; El-Rayes, Bassel; Kooby, David; Sarmiento, Juan; Muraki, Takashi; Oliva, Irma; Bandyopadhyay, Sudeshna; Akkas, Gizem; Goodman, Michael; Reid, Michelle D.; Krasinskas, Alyssa; Everett, Rhonda; Adsay, VolkanMost studies have failed to identify any prognostic value of the current T-stage protocol for pancreatic ductal adenocarcinoma (PDAC) by the American Joint Committee on Cancer and the Union for International Cancer Control unless some grouping was performed. To document the parameters included in this T-stage protocol, 223 consecutive pancreatoduodenectomy specimens with PDAC were processed by a uniform grossing protocol. Peripancreatic soft tissue (PST) involvement, the main pT3 parameter, was found to be inapplicable and irreproducible due to lack of a true capsule in the pancreas and variability in the amount and distribution of adipose tissue. Furthermore, 91 % of the cases showed carcinoma in the adipose tissue, presumably representing the PST, and thus were classified as pT3. An additional 4.5 % were qualified as pT3 due to extension into adjacent sites. The T-stage defined as such was not found to have any correlation with survival (p = 0.4). A revised T-stage protocol was devised that defined pT1 as 2 cm or smaller, pT2 as > 2-4 cm, and pT3 as larger than 4 cm. This revised protocol was tested in 757 consecutive PDACs. The median and 3-year survival rates of this size-based protocol were 26, 18, 13 months, and 40 %, 26 %, 20 %, respectively (p < 0.0001). The association between higher T-stage and shorter survival persisted in N0 cases and in multivariate modeling. Analysis of the Surveillance, Epidemiology, and End Results database also confirmed the survival differences (p < 0.0001). This study showed that resected PDACs are already spread to various surfaces of the pancreas, leaving only about 4 % of PDACs to truly qualify as pT1/T2, and that the current T-stage protocol does not have any prognostic correlation. In contrast, as shown previously in many studies, size is an important prognosticator, and a size-based T-stage protocol is more applicable and has prognostic value in PDAC.Publication Open Access The Role of p16, p21, p27, p53 and Ki-67 Expression in the Differential Diagnosis of Cutaneous Squamous Cell Carcinomas and Keratoacanthomas: An Immunohistochemical Study(AVES, 2016-04-11) BAĞCI ÇULÇİ, PELİN; Bedir, Recep; Gucer, Hasan; Sehitoglu, Ibrahim; Yurdakul, Cuneyt; Bagci, Pelin; Ustuner, PelinBackground: Distinguishing squamous cell carcinoma (SCC) from keratoacanthoma (KA) by histopathological features may not be sufficient for a differential diagnosis, as KAs may, in some cases, imitate well-differentiated SCCs. Aims: In this study, we investigated whether the expression of the p16, p21, p27, p53 genes and a Ki-67 proliferation index are useful in distinguishing between these two tumors. Study Design: Cross-sectional study. Methods: Immunohistochemistry was used to investigate the expression of the p16, p21, p27, p53 genes and the Ki-67 proliferation index was investigated in well-differentiated SCC with KA-like features (n=40) and KA (n=30). Results: The results of all of the examined markers, except for p27 (p16, p21, p53, and Ki-67) were found to be significantly different between the SCC and KA samples (p<0.05). Conclusion: In well-differentiated SCC with KA-like features and KA cases where the differential diagnosis is difficult from a histopathological perspective, the use of p16, p21, p53 expression and a Ki-67 proliferation index can be useful for the differential diagnosis of SCCs and KAs.Publication Metadata only The Value of HBME-1 and Claudin-1 Expression Profile in the Distinction of BRAF-Like and RAS-Like Phenotypes in Papillary Thyroid Carcinoma(HUMANA PRESS INC, 2016) BAĞCI ÇULÇİ, PELİN; Gucer, Hasan; Bagci, Pelin; Bedir, Recep; Sehitoglu, Ibrahim; Mete, OzgurThis study compared the expression profile of HBME-1 and claudin-1 in 90 papillary thyroid carcinomas (PTCs) with respect to the tumor architecture and invasive growth as reflected in 46 BRAF-like, 31 non-invasive RAS, and 13 invasive RAS-like phenotypes. Individual tumors were given an expression score (max 300) by multiplying the percent positive tumor cells by the intensity score (range 0-3). The higher expression of HBME-1 and claudin-1 distinguished BRAF-like phenotype from RAS-like phenotype. The same correlation was also retained for both markers when comparing BRAF-like phenotype with non-invasive and invasive RAS-like phenotypes. The expression scores and positivity rates for both markers did not yield any statistical difference among BRAF-like PTCs. Except the higher positivity rate of HBME-1, invasive RAS-like tumors were not statistically different than their non-invasive counterparts with respect to the positivity rate of claudin-1 and the expression scores of both markers. A central lymph node dissection or selective lymph node sampling was available in 20 specimens. The absence of claudin-1 expression has not been a feature of lymph node metastasis in this series. Despite the limited number of nodal sampling, BRAF-like phenotype and claudin-1 positivity status have been considered the best determinants of positive predictive value and negative predictive value in the prediction of lymph node metastasis among variables, respectively. Adoption of the simplified architectural classification approach to PTCs showed distinct biomarker expression profile in this series; however, immunohistochemistry for HBME-1 and claudin-1 does not seem to be useful in the distinction of invasive RAS-like PTCs from their non-invasive counterparts. Given the overlapping molecular signatures within the RAS-like phenotype, further studies with additional biomarkers are still needed to identify distinct protein expression signatures of non-invasive RAS-like phenotype as this diagnostic category still remains a surgical diagnosis at this time.Publication Open Access Intrapancreatic distal common bile duct carcinoma: Analysis, staging considerations, and comparison with pancreatic ductal and ampullary adenocarcinomas(NATURE PUBLISHING GROUP, 2016-11) BAĞCI ÇULÇİ, PELİN; Gonzalez, Raul S.; Bagci, Pelin; Basturk, Olca; Reid, Michelle D.; Balci, Serdar; Knight, Jessica H.; Kong, So Yeon; Memis, Bahar; Jang, Kee-Taek; Ohike, Nobuyuki; Tajiri, Takuma; Bandyopadhyay, Sudeshna; Krasinskas, Alyssa M.; Kim, Grace E.; Cheng, Jeanette D.; Adsay, N. VolkanDistal common bile duct carcinoma is a poorly characterized entity for reasons such as variable terminology and difficulty in determining site of origin of intrapancreatic lesions. We compared clinicopathologic features of pancreatobiliary-type adenocarcinomas within the pancreas, but arising from the distal common bile duct, with those of pancreatic and ampullary origin. Upon careful review of 1017 pancreatoduodenectomy specimens with primary adenocarcinoma, 52 (5%) qualified as intrapancreatic distal common bile duct carcinoma. Five associated with an intraductal papillary neoplasm were excluded; the remaining 47 were compared to 109 pancreatic ductal adenocarcinomas and 133 ampullary carcinomas. Distal common bile duct carcinoma patients had a younger median age (58 years) than pancreatic ductal adenocarcinoma patients (65 years) and ampullary carcinoma patients (68 years). Distal common bile duct carcinoma was intermediate between pancreatic ductal adenocarcinoma and ampullary carcinoma with regard to tumor size and rates of node metastases and margin positivity. Median survival was better than for pancreatic ductal adenocarcinoma (P=0.0010) but worse than for ampullary carcinoma (P=0.0006). Distal common bile duct carcinoma often formed an even band around the common bile duct and commonly showed intraglandular neutrophil-rich debris and a small tubular pattern. Poor prognostic indicators included node metastasis (P=0.0010), lymphovascular invasion (P=0.0299), and margin positivity (P=0.0069). Categorizing the tumors based on size also had prognostic relevance (P=0.0096), unlike categorization based on anatomic structures invaded. Primary distal common bile duct carcinoma is seen in younger patients than pancreatic ductal adenocarcinoma or ampullary carcinoma. Its prognosis is significantly better than pancreatic ductal adenocarcinoma and worse than ampullary carcinoma, at least partly because of differences in clinical presentation. Use of size-based criteria for staging appears to improve its prognostic relevance. Invasive pancreatobiliary-type distal common bile duct carcinomas are uncommon in the West and have substantial clinicopathologic differences from carcinomas arising from the pancreas and ampulla.Publication Open Access Calculation of the Ki67 index in pancreatic neuroendocrine tumors: a comparative analysis of four counting methodologies(NATURE PUBLISHING GROUP, 2015-05) ERBARUT SEVEN, İPEK; Reid, Michelle D.; Bagci, Pelin; Ohike, Nobuyuki; Saka, Burcu; Seven, Ipek Erbarut; Dursun, Nevra; Balci, Serdar; Gucer, Hasan; Jang, Kee-Taek; Tajiri, Takuma; Basturk, Olca; Kong, So Yeon; Goodman, Michael; Akkas, Gizem; Adsay, VolkanKi67 index is now an essential part of classification of pancreatic neuroendocrine tumors. However, its adaptation into daily practice has been fraught with challenges related to counting methodology. In this study, three reviewers used four counting methodologies to calculate Ki67 index in 68 well-differentiated pancreatic neuroendocrine tumors: (1) 'eye-ball' estimation, which has been advocated as reliable and is widely used; (2) automated counting by image analyzer; (3) manual eye-counting (eye under a microscope without a grid); and (4) manual count of camera-captured/printed image. Pearson's correlation (R) was used to measure pair-wise correlation among three reviewers using all four methodologies. Average level of agreement was calculated using mean of R values. The results showed that: (1) 'eye-balling' was least expensive and fastest (average time <1 min) but had poor reliability and reproducibility. (2) Automated count was the most expensive and least practical with major impact on turnaround time (limited by machine and personnel accessibility), and, more importantly, had inaccuracies in overcounting unwanted material. (3) Manual eye count had no additional cost, averaged 6 min, but proved impractical and poorly reproducible. (4) Camera-captured/printed image was most reliable, had highest reproducibility, but took longer than 'eye-balling'. In conclusion, based on its comparatively low cost/benefit ratio and reproducibility, camera-captured/printed image appears to be the most practical for calculating Ki67 index. Although automated counting is generally advertised as the gold standard for index calculation, in this study it was not as accurate or cost-effective as camera-captured/printed image and was highly operator-dependent. 'Eye-balling' produces highly inaccurate and unreliable results, and is not recommended for routine use.Publication Open Access Intraductal Neoplasms of the Pancreas: An Update(FEDERATION TURKISH PATHOLOGY SOC, 2017) BAĞCI ÇULÇİ, PELİN; Askan, Gokce; Bagci, Pelin; Memis, Bahar; Basturk, OlcaWith improvements in imaging to detect silent pancreatic lesions and increases in the number of centers now performing pancreatic surgery, more surgeries have been performed for indications other than invasive carcinoma. This has enormously added to our knowledge of the intraductal neoplasms of the pancreas. In addition, our understanding of the genetics of these lesions has expanded with the introduction of routine molecular genetic analyses. In this review, we provide an update into the most common intraductal neoplasms, namely intraductal papillary mucinous neoplasm and intraductal tubulopapillary neoplasm. We first focus on their clinicopathologic and molecular features of relevance to the practicing pathologist and then discuss their differential diagnoses.Publication Metadata only Helicobacter pylori is undetectable in intraductal papillary mucinous neoplasm(ELSEVIER SCIENCE BV, 2016) ÇELİKEL, ÇİĞDEM; Baysal, Birol; Ince, Ali Tuzun; Gultepe, Bilge; Gucin, Zuhal; Malya, Fatma Umit; Tozlu, Mukaddes; Senturk, Hakan; Bagci, Pelin; Celikel, Cigdem Ataizi; Aker, Fugen; Ozkara, Selvinaz; Pasaoglu, Esra; Dursun, Nevra; Ozguven, Banu Yilmaz; Tuncel, DenizBackground: About half of the world population is infected with Helicobacter pylori (H. pylori), a bacterium associated with gastric cancer and considered to be a risk factor for pancreatic ductal adenocarcinoma. Whether the bacterium is associated with intraductal papillary mucinous neoplasm, believed to be a precursor of pancreatic ductal adenocarcinoma, is unknown. The aim of this study was to investigate the presence of H. pylori DNA in tissue sections of intraductal papillary mucinous neoplasm. Methods: The presence of H. pylori DNA was tested in a retrospective controlled study of formalin-fixed, paraffin-embedded pancreatic tissues from 24 patients who underwent surgery for intraductal papillary mucinous neoplasm. Histologically normal tissues surrounding neoplasms were used as control. H. pylori DNA was evaluated after deparaffinization, DNA extraction, and purification, and results were evaluated statistically. Results: Samples were collected from 13 males and 11 females with mean age 59 years (range 44-77), and consisted of 19 cases of main-duct and three cases of branched-duct intraductal papillary mucinous neoplasm. Two patients were diagnosed with pancreatic cancer and main-duct intraductal papillary mucinous neoplasm. H. pylori DNA was not detected either in intraductal papillary mucinous neoplasm tissue, or in surrounding normal tissue. Conclusions: Although H. pylori has been implicated in pancreatic ductal adenocarcinoma, it may not play a key role in the development of intraductal papillary mucinous neoplasm. (C) 2016 IAP and EPC. Published by Elsevier B.V. All rights reserved.Publication Open Access Dedifferentiated Liposarcoma of the Gastroesophageal Junction(DE GRUYTER POLAND SP ZOO, 2015) BAĞCI ÇULÇİ, PELİN; Askan, Gokce; Bagci, Pelin; Hameed, Meera; Basturk, OlcaLiposarcoma is one of the most common sarcomas in adults, but very rarely presents as a primary in the upper gastrointestinal system. Herein, we present a 71-year-old male patient who underwent wedge excision biopsy twice and then fine needle aspiration and total gastrectomy for a recurrent gastroeosophageal junction mass. In microscopic sections, both well-differentiated and dedifferentiated components were seen. Tumor cells were positive for MDM2, CDK4 and negative for CD117, DOG1, CD34, SMA, Desmin, S-100, HMB45, SOX10, AE1/AE3, CAM5.2, CK18. Fluorescence in situ hybridization (FISH) was performed and MDM2 gene (12q15) amplification was detected. According to these findings, a diagnosis of dedifferentiated liposarcoma was supported. We believe this is the first reported case of dedifferentiated liposarcoma of the gastroesophageal junction.Publication Metadata only The role of the adhesion molecule Nectin-4 in the pathogenesis of endometriosis(I R O G CANADA, INC, 2016) BAĞCI ÇULÇİ, PELİN; Bedir, R.; Sehitoglu, I.; Balik, G.; Kagitci, M.; Gucer, H.; Yurdakul, C.; Bagci, P.Objective: Nectins are immunoglobulin-like adhesion molecules, and they play important role in cell proliferation and tumor metastasis. The objective in this study was to compare the expression of Nectin-4 in normal endometrium and in ectopic endometriotic tissues. Materials and Methods: Nectin-4 expression was investigated in ovarian endometriosis (n=20), peritoneal endometriosis (n=20), endometrium of endometriosis (n=20), and in a control group (having no endometriosis) (n=20) by immunohistochemical method. Results: Nectin-4 expression, when compared with control group, was higher in endometriotic lesions of patients having ovarian endometriosis and peritoneal endometriosis (p = 0.003 andp = 0.009, respectively). This difference was significant in the endometrium of patients having endometriosis (p = 0.011). Conclusion: The authors believe that Nectin-4 molecule may contribute to the pathogenesis of endometriosis. For this reason, the use of medicines developed against this molecule in the treatment of endometriosis may be useful.