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Öğe Adult Onset Langerhans Cell Histiocytosis: A Single Center Experience(Cig Media Group, Lp, 2018) Ozcan, Mehmet Ali; Davulcu, Eren Arslan; Ulusoy, Yusuf; Demir, Derya; Kamer, Serra; Bulbul, Hale; Atilla, Dilan; Soyer, Nur Akad; Sahin, Fahri; Hekimgil, Mine; Saydam, GürayÖğe The Association of the Epidermal Growth Factor Receptor (EGFR) Immunoexpression With Prognostic Parameters in Adenocarcinoma Patients Receiving Neoadjuvant Treatment(Springernature, 2024) Demir, Derya; Parvizi, Murtaza; Pehlivanoglu, Burcin; Ergin, Erhan; Ayhan, Semin; Doganavsargil, BasakThe epidermal growth factor receptor (EGFR) expression is considered to play an essential role in the pathogenesis of colorectal adenocarcinoma. This study assessed the expression and predictive/prognostic value of EGFR expression in pre -op biopsy and post -op resection specimens in patients receiving neoadjuvant radiotherapy/neoadjuvant chemoradiotherapy (NRT/NCRT). Thirty-four consecutive patients were included in this study. The association between the prognostic features and EGFR immunohistochemical expression was analyzed in pre- (n=34) and post -treatment (n=22) tissue samples in cases with available tissue blocks. Of 34, 23 (67.6%) were men. The median age was 60.50 +/- 10.69 (range, 31-84) years. EGFR expression was detected in 88.2% of biopsy specimens and in 91.2% of surgical specimens. There was only slight agreement between pre -op and post -op EGFR expression scores (kappa value 0.11). There was no significant correlation between pre -op and post -op EGFR expression scores (p>0.05). Although pre -op EGFR positivity and higher pre -op EGFR scores seemed to indicate a worse prognosis, this association between pre -op EGFR expression and overall survival (OS) or disease -specific survival (DSS) did not reach statistical significance (p>0.05). The only case with a post -op EGFR score of three who died of the disease experienced local recurrence and had distant metastasis. In conclusion, EGFR positivity in pre -op biopsy samples seems to be associated with shorter survival, and increased EGFR expression in post -treatment resection specimens predicts aggressive behavior in patients with rectal adenocarcinoma who received NRT/NCRT. However, due to the molecular heterogeneity, EGFR expression status should be evaluated in resection specimens rather than in pre -op biopsy samples for optimal prognosis prediction.Öğe Castleman's Disease: The Experience Over 17 Years(Cig Media Group, Lp, 2018) Saydam, Güray; Atilla, Fatos Dilan; Demir, Derya; Bulbul, Hale; Davulcu, Eren Arslan; Ulusoy, Yusuf; Hekimgil, Mine; Ozsan, Nazan; Sahin, FahriÖğe Clinicopathological characteristics, genetics and prognosis of patients with myeloid sarcoma: a single-center study(Bmj Publishing Group, 2022) Demir, Derya; Hekimgi, Mine; Karaca, Emin; Ulusoy, Yusuf; Ozdemir, Hamiyet Hekimci; Saydam, Guray; Durmaz, BurakAim Myeloid sarcoma (MS) is a rare tumour comprising myeloid blasts occurring at an anatomical site other than the bone marrow. We sought to investigate both paediatric and adult patients with MS diagnosed at our institution and determine possible correlations among their clinicopathological, phenotypic, molecular and prognostic features. Methods This study retrospectively evaluated the data of 45 patients diagnosed with MS at Ege University Faculty of Medicine Hospital, Turkey, over a 17-year period. Results The male-to-female ratio was 1.5:1, and the median age was 39.12 years. The most commonly involved sites were the skin, lymph nodes, soft tissues and bone. Immunohistochemically, CD68-KP1 was the most commonly expressed marker, followed by CD33, myeloperoxidase, CD117, lysozyme, CD68-PGM1 and CD34. Of the patients, 26 (57.7%) presented with de novo MS, 7 (15.5%) had simultaneous acute myeloid leukaemia and 12 (26.8%) had a previous history of haematological disorders. Kaplan-Meier survival analysis revealed that the 2-year and 5-year overall survival (OS) rates were 46.4% and 39.8%, respectively; the median OS duration was 11 months. Increasing age had a negative prognostic relationship with survival (p = 0.04). Chromosomal abnormalities were detected in approximately 6/10 (60%) of paediatric patients and 6/9 (66.7%) of adult patients. t(8;21)(q22;q22) translocation was identified in 20% of paediatric patients. Conclusions MS diagnosis is usually challenging; an expanded immunohistochemical panel should be used for an accurate diagnosis. Although MS generally has a poor prognosis, increasing age appears to be associated with a worse outcome.Öğe Comparison of Acute and Chronic Stabilization Efficiencies of Two Suturing Methods Used in Pectoral Muscle Fixation of Cardiac Implantable Electronic Devices(Wiley, 2023) Gunes, Mustafa Talha; Simsek, Evrim; Duman, Soner; Demir, Derya[Abstarct Not Available]Öğe Effect of allicin on wound healing: an experimental diabetes model(Ma Healthcare Ltd, 2020) Toygar, Ismail; Tureyen, Aynur; Demir, Derya; Cetinkalp, SevkiObjective: the aim of this study was to investigate the effect of allicin on wound healing in an experimental diabetes model. Method: in this randomised controlled study, 50 Wistar albino rats (25 females, 25 males) each weighing 200-300g were used. To develop the diabetes model, 30 rats were induced with 50mg/kg streptozotocin (STZ); 20 rats were not induced in order to compare diabetic and nondiabetic rats. the diabetic rats were divided into three groups, according to dressing material used (allicin, physiological serum and control, where no dressing was used), and the nondiabetic rats were divided into two groups (allicin and control, where no dressing was used). the wound area was calculated and recorded on days 0, 7, 14 and 21. in addition, biopsies were taken from the wound area on days 0, 7, 14 and 21 and used for microscopic examination. Day 0 was used as a reference to calculate wound healing percentage. Results: on days 7 and 14, there were statistically significant differences between groups. Wound surface areas were smaller in the allicin group than in other groups on days 7 and 14. There were no statistically significant differences between the groups on day 21. in addition, it was determined that neutrophil, mononuclear cell, intraepithelial oedema and dermal oedema density were lower and fibroblast, angiogenesis and collagen density were higher in the allicin groups on days 7 and 14. Conclusion: in this study, allicin was found to be potentially effective on wound healing. Future research should be conducted in order to clarify how it affects wound healing.Öğe The Effect of Lavandula stoechas on Wound Healing in an Experimental Diabetes Model(Springernature, 2023) Demir, Derya; Toygar, Ismail; Soylu, Emrah; Aksu, Ali Tarik; Tureyen, Aynur; Yildirim, Ilgin; Cetinkalp, SevkiIntroduction: Diabetic foot is a consequential and dangerous complication of diabetes, contributing to decreased quality of life, escalated hospitalizations, and increased mortality rates. Using an experimental model of diabetes, this study aims to investigate the effect of Lavandula stoechas on wound healing.Methods: A total of 35 albino Wistar rats, 250-350 grams in weight, were used. The rats were divided into five groups, seven rats in each group. Of these, 21 rats were induced with 50 mg/kg streptozotocin (STZ) to mimic the diabetic condition. Additionally, 14 rats remained non-diabetic and served as the control group. The diabetic rats were further divided into three subgroups. The non-diabetic group was split into two subgroups based on the dressing materials used (allicin, physiological serum, and control). Wound dimensions were assessed on Days 0, 7, 14, and 21. Biopsies were taken from the wound sites at the same time.Results: There were significant differences between groups on Days 7, 14, and 21. The percentage of healing was highest in the Lavandula Stoechas group on Days 7, 14, and 21. Microscopic examination of the biopsies supported accelerated wound healing on Days 7 and 14. Reduced mononuclear cell density and increased hair follicle and adipose tissue development were observed in the DM (diabetes mellitus)-Lavandula Stoechas group on Day 7. On Day 14, the DM-Lavandula Stoechas group increased collagen levels and hair follicles. Similarly, the non-DM-Lavandula Stoechas group showed reduced bullae, dermal edema, and intraepithelial edema on Day 7. This was followed by increased fibroblast levels on Day 14.Conclusions: In conclusion, this study provides compelling evidence for the potential of Lavandula stoechas extract in the enhancement of diabetic wound healing. The multiple interactions revealed here highlight the need for further investigation into the underlying mechanisms. A cost-effective use of Lavandula stoechas opens up promising prospects in managing diabetic foot healing. This warrants additional research and clinical translation.Öğe Ege Üniversitesi hastanesi veri tabanında kayıtlı erişkin akut lösemi olgularının epidemiyolojik ve genel sağkalım özelliklerinin retrospektif olarak değerlendirilmesi(2020) Demir, Derya; Vural, Filiz; Özsan, Nazan; Demir, Emre; Keklik, Fatma; Paşayev, Tural; Saydam, GurayAmaç: Akut lösemi/lenfoma ve myeloid sarkom, hematopoietik prekürsör hücrelerden gelişen klonal neoplastik proliferasyonlardır. Bu çalışmada, olgularının epidemiyolojik analizlerinin yapılması, global sonuçlarla karşılaştırılarak değerlendirilmesi amaçlanmıştır. Gereç ve Yöntem: Ege Üniversitesi Kanserle Savaş Araştırma ve Uygulama Merkezi veri tabanına kayıtlı, 1992-2017 yıllarında akut lösemi/lenfoma ve myeloid sarkom tanısı alan 2.046 erişkin olgu retrospektif olarak değerlendirilmiştir. Bulgular: Olguların %58’i erkek olup; ortalama tanı yaşı 50,62, medyan tanı yaşı ise 52 idi. En sık (%62,5) akut myeloid lösemi (AML) izlendi. Olguların %95,8’i lösemik prezentasyon göstermekteydi. Sınıflandırılamayan lenfoblastik lösemi (ALL) olguları yıllara göre azalırken, diğer gruplarda yıllara göre lösemi tanısında artış dikkatimizi çekti. Çocukluk yaş grubunda daha sık karşımıza çıkan ALL olgularında yaş arttıkça görülme oranlarının azaldığı, hücre dizisi belirsiz akut lösemi olgularında ise yaş arttıkça görülme oranlarının da arttığı saptandı. AML ve tüm lösemi olguları ise en çok 40-64 yaş aralığında yer almaktaydı. Akut lösemi olgularında 1, 5, 10 ve 25 yıllık sağkalım sırasıyla %55,7, %29, %23 ve %15 olarak bulundu. Ayrıca sağkalım 18-39 yaş grubunda %52,3, 40-64 yaş grubunda %35,3, 65 yaş ve üstü grupta %20,9 idi. Sonuç: Cinsiyet ve sağkalım arasında bir fark saptanmaz iken, lösemik prezentasyon gösterenlerde, tedavi almayan olgularda ve yaş arttıkça sağkalım daha kısa bulunmuş ve istatistiksel olarak da anlamlı saptanmıştır. Prognozda, histolojik tip, yaş ve tedavi bizim çalışmamızda da öne çıkan önemli parametrelerdendir.Öğe Ege Üniversitesi Hastanesi veri tabanında kayıtlı erişkin Hodgkin dışı lenfoma olgularının epidemiyolojik özelliklerinin retrospektif olarak değerlendirilmesi(2020) Demir, Derya; Özsan, Nazan; Demir, Emre; Arslan, Ayşenur; Davulcu, Eren Arslan; Soyer, Nur Akad; Hekimgil, MineAmaç: Hodgkin dışı lenfomalar (NHL), lenfoproliferatif hastalıkların da yer aldığı heterojen bir gruptur. Bu çalışmada, NHL olgularının epidemiyolojik analizlerinin yapılması, global sonuçlarla karşılaştırılarak değerlendirilmesi amaçlanmıştır. Gereç ve Yöntem: Ege Üniversitesi Kanserle Savaş Araştırma ve Uygulama Merkezi veri tabanına kayıtlı, 1992-2017 yıllarında NHL tanısı alan 4.561 erişkin olgu retrospektif olarak değerlendirilmiştir. Bulgular: Olguların %56,7’si erkek olup; ortalama yaş 56,77, ortanca yaş 59 idi. En sık %38,1 diffüz büyük B-hücreli lenfoma (DBBHL) olmak üzere sırasıyla küçük lenfositik lenfoma, marjinal zon lenfoma, folliküler lenfoma (FL) izlendi. Olguların %52,5’i nodal, %31’i ekstranodal yerleşimden tanı aldı. Matür B-hücreli neoplazmlar yıllara göre artış gösterirken, matür T-hücreli neoplazmlarda artış saptanmadı. Sınıflandırılamayan NHL olgularının ise yıllara göre azaldığı dikkatimizi çekti. Tüm yaş gruplarında erkeklerde kadınlara göre daha fazla idi (p=0,003). Olguların yaklaşık yarısı 40-64 yaş aralığındaydı. Ayrıca mantle hücreli lenfoma (MHL) hariç, diğer histolojik tiplerin en çok 40-64 yaş aralığında; MHL’nın ise en çok 65 yaş ve üstü grupta karşımıza çıktığı izlendi. Çocukluk yaş grubunda sık görülen Burkitt lenfomada ise olguların %86,2’si 18-64 yaş aralığında idi. Sonuç: FL, Batı Avrupa ve Kuzey Amerika’da daha sık görülürken, DBBHL Dünya’da daha yaygın görülmektedir. Bizim çalışmamızda da DBBHL en sık görülen NHL tipidir. FL ise Batı toplumları ile kıyaslandığında daha az karşımıza çıkmaktadır. Çalışmamızda NHL’ler erkeklerde kadınlara göre daha sıktır. Ayrıca yıllara göre hastalığın lokalize kalma eğiliminin arttığı ve yaş gruplarına göre de 18- 39 yaş aralığında daha lokalize kalma eğiliminde iken, yaş arttıkça daha yaygın hastalık tablosu oluşturduğu dikkatimizi çekmiştir. NHL’ye ait 25 yılı kapsayan çok geniş bir serinin değerlendirildiği çalışmamız, ülkemize ait epidemiyolojik verilerin belirlenebilmesi açısından önem taşımaktadır.Öğe Ege Üniversitesi Hastanesi veri tabanında kayıtlı erişkin Hodgkin lenfoma olgularının epidemiyolojik ve genel sağ kalım özelliklerinin retrospektif olarak değerlendirilmesi(2020) Demir, Derya; Hekimgil, Mine; Demir, Emre; Bülbül, Hale; Ulusoy, Yusuf; Soyer, Nur Akad; Özsan, NazanAmaç: Hodgkin lenfoma (HL) sıklığı ve mortalite oranları tüm dünyada değişkenlik göstermektedir. Bu çalışmada, HL olgularının epidemiyolojik ve genel sağ kalım analizlerinin, global sonuçlarla karşılaştırılarak değerlendirilmesi amaçlanmıştır. Gereç ve Yöntem: Ege Üniversitesi Kanserle Savaş Araştırma ve Uygulama Merkezi veri tabanına kayıtlı, 1992-2017 yıllarında HL tanısı alan 972 erişkin olgu retrospektif olarak değerlendirilmiş, CANREG-4 ile kaydedilen veriler SPSS’e aktarılmıştır. Bulgular: Olguların %59,9’u erkek olup, ortalama tanı yaşı 41,8 ve medyan tanı yaşı 39 idi. Olguların %94,4’ü klasik Hodgkin lenfoma (KHL) tanısı aldı. Alt tiplerine baktığımızda %42,1 nodüler sklerozan (NS)-KHL, %31,0 mikst sellüler (MS)-KHL, %5,2 lenfositten zengin (LZ)-KHL, %2,9 lenfositten fakir (LF)-KHL olarak değerlendirildi. Erkeklerde kadınlara göre anlamlı yüksekti. Noduler lenfosit predominant HL olgularının tamamı EBV negatif iken; KHL olgularının %52,7’si pozitifti (p<0,0001). Ayrıca %59 lokalize, %16,4 bölgesel, %24,7 yaygın hastalık oluşturmaktaydı. Sağ kalım analizleri bilinen 971 olgunun sağkalımı 1 yıllık %92, 5 yılllık %81, 10 yıllık %70, 15 yıllık %62, 25 yıllık %43 idi. Kemik iliği lokalizasyonundan tanı alan olguların sağ kalımının kısa olduğu saptandı (p<0,0001). Sonuç: HL, en sık görülen ikinci lenfoma tipi olup, erkeklerde kadınlara göre daha sık karşımıza çıkmaktadır. NSKHL en sık görülen alt tip olmakla birlikte, gelişmiş ülkelere göre biraz daha az görüldüğü, MSKHL ve LFKHL alt tiplerinin ise daha ön plana çıktığı dikkatimizi çekmektedir. Ayrıca olgularımızda EBV görülme oranları, gelişmiş ülkelere kıyaslandığında fazla olup, Asya ve Latin Amerika’ya göre daha düşüktür. Erkeklerde, kemik iliği tutulumu olanlarda ve yaygın hastalık oluşturanlarda sağ kalım daha kısa bulunmuştur. Prognostik açıdan, cinsiyet ve hastalık evresi bizim çalışmamızda da öne çıkan önemli parametreler arasında saptanmıştır.Öğe Epidermal growth factor receptor expression and adjuvant chemoradiotherapy in rectal cancer Epidermal growth factor recepto in operated rectal cancer(Bayrakol Medical Publisher, 2023) Parvizi, Murtaza; Demir, Derya; Kut, Engin; Ergin, Erhan; Ayhan, Semin; Doganavsargil, BasakAim: Epidermal Growth Factor Receptor (EGFR) is a trans-membrane protein with tyrosine kinase activity and is expressed in 25-80% of colon cancer cases. EFGR expression is prognostic in patients with metastatic colorectal cancer, and anti-EGR- based therapies are routinely used in the treatment of patients with metastatic colorectal cancer. To the best of our knowledge, the relationship between EGFR expression and prognosis in directly operated patients who did not receive neoadjuvant treatment and subsequently received chemo-radiotherapy is unknown. Therefore, we retrospectively evaluated patients with stage 3 rectal cancer who underwent surgery without any preoperative treatment in our center and aimed to investigate the relationship between EGFR expression and prognosis in patients who received adjuvant chemoradiotherapy. Material and Methods: The data of patients who underwent surgery for rectal cancer and received chemoradiotherapy between 2010 and 2016 at Manisa State Hospital were retrospectively analyzed. Results: According to EGFR expression, it was 127.01 (95% CI, 85.43-168.59) months in the group with 10% less staining and 47.44 (95% CI, 26.77-68.12) months in the group with 10% or more staining. Lymphovascular invasion (p=0.032), perineural invasion (p=0.023), histologic grade (p=0.004) and EGFR expression percentage (p=0.005) were significantly associated with survival in multivariate analyses Discussion: The presence of 10% or more EGFR expression, LVI, PNI, and histological grade are significantly associated with survival in stage 3 rectal cancer patients who have undergone surgery and received postoperative chemotherapy. These markers can be used as prognostic biomarkers in the follow-up and treatment of these patients.Öğe Expression of Cyclin D1 and Its Relationship to Hormone Receptors and Survival in Breast Cancer(Kare Publ, 2017) Alanyali, Senem; Yeniay, Levent; Demir, Derya; Aydin, Barbaros; Zekioglu, Osman; Ozdemir, Necmettin; Kitapcioglu, Gul; Haydaroglu, AyferOBJECTIVE The aim of the present study was to evaluate rate of cyclin D1 expression and examine its relationship to clinicopathological factors and impact on prognosis in breast cancer patients. METHODS Total of 85 estrogen receptor (ER)-positive breast cancer patients were included. Expression of cyclin D1, ER, progesterone receptor (PR), and Ki-67 were determined using immunohistochemistry evaluation. RESULTS Patients' median age was 49 years (range: 27-83 years) and cyclin D1 was positive in 90.5% of the patients. Cyclin D1 expression was positively correlated with rate of ER positivity and Ki-67 expression (r=0.4; p<0.0001 and r=0.3; p=0.001, respectively). Five-year disease-free and overall survival (OS) rates were not different between patients with or without cyclin D1 expression (81% vs 79% and 93% vs 87%; p=0.8 and 0.4, respectively). High modified Bloom-Richardson grade (p=0.04), high nuclear grade (p=0.021), and PR negativity (p=0.011) were found to be poor prognostic factors for OS rate in univariate analysis. CONCLUSION In this study, cyclin D1 was not found to be prognostic factor; however, it is correlated with ER positivity and Ki-67 expression in breast cancer patients.Öğe Expression of Cyclin D1 and Its Relationship to Hormone Receptors and Survival in Breast Cancer(2017) Yeniay, Levent; Demir, Derya; Aydın, Barbaros; Zekioğlu, Osman; Özdemir, Necmettin; Kitapçıoğlu, Gül; Alanyalı, SenemThe aim of the present study was to evaluate rate of cyclin D1 expression and examine its relationship to clinicopathological factors and impact on prognosis in breast cancer patients.METHODSTotal of 85 estrogen receptor (ER)-positive breast cancer patients were included. Expression of cyclin D1, ER, progesterone receptor (PR), and Ki-67 were determined using immunohistochemistry evaluation.RESULTSPatients’ median age was 49 years (range: 27–83 years) and cyclin D1 was positive in 90.5% of the patients. Cyclin D1 expression was positively correlated with rate of ER positivity and Ki-67 expression (r=0.4; p<0.0001 and r=0.3; p=0.001, respectively). Five-year disease-free and overall survival (OS) rates were not different between patients with or without cyclin D1 expression (81% vs 79% and 93% vs 87%; p=0.8 and 0.4, respectively). High modified Bloom-Richardson grade (p=0.04), high nuclear grade (p=0.021), and PR negativity (p=0.011) were found to be poor prognostic factors for OS rate in univariate analysis.CONCLUSIONIn this study, cyclin D1 was not found to be prognostic factor; however, it is correlated with ER positivity and Ki-67 expression in breast cancer patientsÖğe First Case of FLT3-Tyrosine Kinase Domain Mutant Acute Myeloid Leukemia With Unusual Onset as Isolated Bilateral Testicular Myeloid Sarcoma(Springernature, 2024) Erol, Veysel; Cagliyan, Gulsum Akgun; Ufuk, Furkan; Demir, DeryaTesticular myeloid sarcoma (TMS) is a challenging pathology often posing diagnostic difficulties due to the poorly differentiated nature of tumor cells at the initial presentation. The delay in diagnosis significantly impacts patient life expectancy, emphasizing the need for prompt identification and treatment initiation. In certain cases, the presence of the Fms-like tyrosine kinase ( FLT3 ) mutation adds complexity to the disease, requiring tailored therapeutic approaches. In this report, we present a unique case of bilateral TMS with FLT3 tyrosine kinase domain ( TKD ) mutation. The patient exhibited an aggressive clinical course, initially misdiagnosed with orchitis during the initial evaluation. Subsequent reevaluation of the testicular biopsy at a second center led to an accurate diagnosis, highlighting the importance of thorough examination in challenging cases. Given the emerging significance of FLT3 mutations in myeloid sarcomas, comprehensive testing for all FLT3 variants is crucial to determine the appropriate treatment modality. This case underscores the need for increased awareness among healthcare professionals regarding the diagnostic nuances and potential genetic variations associated with TMS. Furthermore, the inclusion of tyrosine kinase inhibitors, such as midostaurin or gilteritinib, especially in the presence of FLT3 mutations, may significantly impact treatment outcomes. This report contributes to the growing body of literature on TMS and highlights the importance of considering FLT3 mutations in the diagnostic and therapeutic decision -making process for improved patient care.Öğe HHV-8-Related Three Malignancies in an Immunocompetent Patient: Kaposi Sarcoma, Multisentric Castleman Disease and Primary Effusion Lymphoma(2019) Davulcu, Eren Arslan; Ulusoy, Yusuf; Bülbül, Hale; Demir, Derya; Hekimgil, Mine; Töbü, MahmutHHV-8 is associated with Kaposi sarcoma, multicentric Castleman disease and primary effusion lymphoma mostly in immunocompromised patients. in this report, we describe a female patient without any immunosuppressive state, encountering those three malignancies throughout her lifetime. A-69-year-old female patient was diagnosed with Kaposi sarcoma in 2009 and multicentric Castleman disease in 2011. She received several chemotherapy regimens during 4 years and stayed in remission during following 5 years. Then, she was diagnosed with primary effusion lymphoma, extracavitary/solitary variant on excisional biopsy of her cervical lymphadenopathy. Despite having 5 different lines of chemotherapy protocols, including autologous stem cell transplantation, and systemic cidofovir treatment, she died because of progressive disease. HHV-8 associated malignancies are not prevalent in immunocompetent patients. Our patient, who has suffered from all three malignancies related to HHV-8, is the only HIV negative patient in the literature with primary effusion lymphoma, extracavitary/solitary variant.Öğe Immunohistochemical Evaluation of Apoptosis and Multidrug Resistance- Related Markers in Gallbladder Dysplasia and Carcinoma(2022) Başak, Kayhan; Demir, Derya; Koçdoğan, Arzu Kaya; Oğuztüzün, SerpilObjective: The search for treatment success in gallbladder carcinomas, which is one of the tumors with the most aggressive course, poor prognosis, and tendency to show resistance to treatment, continues today. Treatments targeting pathways related to genetic changes de- tected in most solid tumors offer new hope in the treatment of these tumors. Some of these treatment modalities target apoptosis-related pathways, and mammalian target of rapamycin (mTOR), p38, Bcl-2, and caspase-3 are important components of this pathway. Methods: In the study, mTOR, caspase-3, p38, Bcl-2, LL-37, MDR1, multidrug resistance protein (MRP)1, MRP6, and MRP7 immunohistochemical staining were applied to paraffin blocks of 27 gallbladder cancer and 62 cases with gallbladder dysplasia. The immunohisto- chemically stained sections were evaluated and scored. Results: mTOR, p38, and caspase-3 expressions were found to be significantly increased in dysplasia and tumor groups, and in dysplastic and malignant cells. While there was no signifi- cant difference in the expression of MRP1 and MRP7, MRP6 was significantly overexpressed. Conclusion: In this study, increased expression of mTOR, p38, and caspase-3 in the dys- plastic and malignant cells of the gallbladder may show that it has a role in the carcinogenesis process in the gallbladder. The study also shows that MRP6 may also play a role in the devel- opment of drug resistance in gallbladder carcinoma.Öğe Insights into the New Molecular Updates in Acute Myeloid Leukemia Pathogenesis(MDPI, 2023) Demir, DeryaAs our understanding of the biologic basis of acute myeloid leukemia evolves, so do the classification systems used to describe this group of cancers. Early classification systems focused on the morphologic features of blasts and other cell populations; however, the explosion in genomic technologies has led to rapid growth in our understanding of these diseases and thus the refinement of classification systems. Recently, two new systems, the International Consensus Classification system and the 5th edition of the World Health Organization classification of tumors of hematopoietic and lymphoid tissues, were published to incorporate the latest genomic advances in blood cancer. This article reviews the major updates in acute myeloid leukemia in both systems and highlights the biologic insights that have driven these changes.Öğe Is it possible to diagnose infectious oesophagitis without seeing the causative organism? A histopathological study(Aves, 2014) Demir, Derya; Doganavsargil, Basak; Sarsik, Banu; Sezak, Murat; Tuncyurek, MugeBackground/Aims: We investigated the utility of using histological changes to diagnose infectious oesophagitis when causative organisms cannot be seen. Materials and Methods: Sixty-seven endoscopic biopsy specimens (51 Candida, 9 herpes simplex virus, 4 tuberculosis, and 3 cytomegalovirus oesophagitis) collected from 2000-2010 that matched the investigative criteria were included in the study. Cases were re-evaluated for histological changes observed in oesophagitis, and the findings were statistically compared using nonparametric tests. Results: Thirty-nine cases occurred in male patients, and 28 occurred in female patients; the mean age of the patients was 51 +/- 20.1 years (range, 5-94 years). All cases showed lymphocytic and neutrophilic infiltration; while 27 (40.3%) showed eosinophilic infiltration. The density of lymphocytes and eosinophils were 8.43 +/- 6 and 1.07 +/- 1.62 per high power field, respectively, and these rates were higher in tuberculosis oesophagitis cases. Lamina propria infiltration was present in herpes simplex virus and Candida oesophagitis. Dense neutrophilic infiltration (>50/high power field) was noted in herpes simplex virus oesophagitis. Candida colonization was observed in 82% of cases with eosinophilic infiltration, and 80% of cases with erosion. Ulceration was present in all tuberculosis oesophagitis cases (p<0.001). Basal cell hyperplasia, papillary elongation, and dilated intercellular spaces were seen in all cases except for 2 Candida oesophagitis cases. Lamina propria fibrosis was especially noted in cytomegalovirus oesophagitis cases. Conclusion: It is not possible to distinguish infectious oesophagitis from other subtypes, especially reflux oesophagitis, if the causative organism is not detected. Clinicopathological correlation and control with repeat targeted biopsies are essential for diagnosis.Öğe Is it possible to diagnose infectious oesophagitis without seeing the causative organism? A histopathological study(2014) Demir, Derya; Yakut, Başak Doğanavşargil; Kumbaracı, Banu Sarsık; Sezak, Murat; Tunçyürek, MügeBackground/Aims: We investigated the utility of using histological changes to diagnose infectious oesophagitis when causative organisms cannot be seen.Materials and Methods: Sixty-seven endoscopic biopsy specimens (51 Candida, 9 herpes simplex virus, 4 tuberculosis, and 3 cytomegalovirus oesophagitis) collected from 2000-2010 that matched the investigative criteria were included in the study. Cases were re-evaluated for histological changes observed in oesophagitis, and the findings were statistically compared using nonparametric tests. Results: Thirty-nine cases occurred in male patients, and 28 occurred in female patients; the mean age of the patients was 51±20.1 years (range, 5-94 years). All cases showed lymphocytic and neutrophilic infiltration; while 27 (40.3%) showed eosinophilic infiltration. the density of lymphocytes and eosinophils were 8.43±6 and 1.07±1.62 per high power field, respectively, and these rates were higher in tuberculosis oesophagitis cases. Lamina propria infiltration was present in herpes simplex virus and Candida oesophagitis. Dense neutrophilic infiltration (>50/high power field) was noted in herpes simplex virus oesophagitis. Candida colonization was observed in 82% of cases with eosinophilic infiltration, and 80% of cases with erosion. Ulceration was present in all tuberculosis oesophagitis cases (p<0.001). Basal cell hyperplasia, papillary elongation, and dilated intercellular spaces were seen in all cases except for 2 Candida oesophagitis cases. Lamina propria fibrosis was especially noted in cytomegalovirus oesophagitis cases. Conclusion: It is not possible to distinguish infectious oesophagitis from other subtypes, especially reflux oesophagitis, if the causative organism is not detected. Clinicopathological correlation and control with repeat targeted biopsies are essential for diagnosis.Öğe Langerhans cell histiocytosis of the thyroid together with papillary thyroid carcinoma(Springer International Publishing Ag, 2020) Ozisik, Hatice; Yurekli, Banu Sarer; Demir, Derya; Ertan, Yesim; Simsir, Ilgin Yildirim; Ozdemir, Murat; Saygili, Fusun[No abstract available]
