Sevil Sayhan

Tepecik Teaching and Research Hospital, Ismir, İzmir, Turkey

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Publications (23)21.63 Total impact

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    ABSTRACT: AT-rich interactive domain 1A (ARID1A) is a tumor suppressor gene involved in chromatin remodeling which encodes ARID1A (BAF250a) protein. Recent studies have shown the loss of ARID1A expression in several types of tumors. This retrospective study was designed to evaluate the differences in tissue expressions of ARID1A in a spectrum of cervical neoplasms. Cervical intraepithelial neoplasms, invasive squamous or adenosquamous carcinomas were identified in 100 patients recently diagnosed as cervical neoplasms based on pathology databases. In this series, there were 29 low- and 29 high-grade cervical intraepithelial neoplasms, 27 squamous cell carcinomas, and 15 adenosquamous carcinomas. Mean age of the patients was 47.8 ± 13 years (20-80 years). It was determined that the expression of ARID1A was statistically significantly down-regulated in adenosquamous carcinomas when compared with non-invasive or invasive squamous cell carcinomas (p = 0.015). Lower levels of the ARID1A expression were detected in cases with adenosquamous carcinomas (60%), low- or high-grade squamous intraepithelial lesion (SIL) (31%), and squamous cell carcinomas (18.5%). Our findings have demonstrated the presence of a correlation between ARID1A expression and adenomatous differentiation of uterine squamous cell carcinomas. Therefore, ARID1A gene may suggestively have a role in the pathogenesis of cervical adenosquamous carcinomas. © 2015 APMIS. Published by John Wiley & Sons Ltd.
    Apmis 08/2015; DOI:10.1111/apm.12435 · 1.92 Impact Factor
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    ABSTRACT: To investigate clinicopathologic characteristics, therapeutic methods, and prognostic factors in women with synchronous primary endometrial and ovarian cancers (SEOCs). A retrospective review of 2 cancer registry databases in Turkey was conducted to identify patients diagnosed with SEOCs between January 1995 and December 2012. Patients with recurrent, metastatic, and metachronously occurring tumors were excluded. Multivariate logistic regression models were used to identify prognostic predictors for progression-free survival (PFS) and overall survival (OS). The analysis included 63 women with SEOCs. Seventy-six percent of the patients had stage I endometrial cancer, and 60% of the patients had stage I ovarian cancer. Thirty-seven patients (58.7%) had endometrioid/endometrioid histology. Optimal cytoreduction was obtained in 47 (74.6%) patients. Recurrence developed in 17 patients (27%). Multivariate analysis confirmed lymphovascular space invasion (LVSI) as an independent poor prognostic factor for OS (odds ratio [OR] 3.1, p = 0.045), whereas early-stage disease and optimal cytoreduction were found to be independent good prognostic factors for both PFS (OR 12.85, p<0.001 and OR 4.58, p = 0.004, respectively) and OS (OR 7.31, p = 0.002 and OR 2.95, p = 0.028, respectively). The 3- and 5-year OS rates were 74% and 69%, respectively. Our study demonstrated that optimal cytoreduction, early-stage disease, and LVSI are the most significant factors affecting survival in women with SEOC.
    06/2015; DOI:10.5301/tj.5000378
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    ABSTRACT: Previous studies have demonstrated that Caveolin-1 (Cav-1) can ambiguously behave as tumor suppressor or tumor promoter in different neoplasms, depending on cancer type. Some findings have also revealed that cell proliferation, migration and invasion were attenuated by the knockdown of Caveolin-1 expressions. However, the functional and prognostic significance of Caveolin-1 in most tumors remains to be fully elucidated. The aim of the study was to investigate a possible association between tissue Caveolin-1 expression and the clinicopathologic features of ovarian serous tumors. Caveolin-1 expression was studied in a total of 82 formalin-fixed, paraffin-embedded specimens of ovarian serous tumors and its association with different clinicopathologic parameters was evaluated. The study included 36 (43.9%) benign, 12 (14.6%) borderline and 34 (41.5%) malignant serous tumors. Mean patient age was 43.9 ± 14.4 years (17-72 years). Statistical analysis revealed that if the tumor becomes more aggressive and invasive, it losses the stromal Caveolin-1 expression (p = 0.001). Also, parallel changes between stromal and perivascular Caveolin-1 expressions were observed. Our findings demonstrated a link between Caveolin-1 expression and the aggressiveness of ovarian cancer. Therefore, it seems safe to suggest that Cav-1 may act as a differential diagnostic biomarker in ovarian serous tumors.
    Ginekologia polska 06/2015; 86(6):424-8. · 0.68 Impact Factor
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    Turkiye Klinikleri Journal of Medical Sciences 01/2015; 35(1):31-35. DOI:10.5336/medsci.2014-41226 · 0.10 Impact Factor
  • Turkiye Klinikleri Jinekoloji Obstetrik 01/2015; 25(1):1-6. DOI:10.5336/gynobstet.2014-38653
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    ABSTRACT: The purpose of this study is to evaluate the clinicopathological characteristics, treatment, and prognosis of uterine carcinosarcoma (UC).
    Cancer Research and Treatment 09/2014; 47(2). DOI:10.4143/crt.2014.009 · 2.98 Impact Factor
  • Tamer Zeren · Sevinc Inan · H Seda Vatansever · Sevil Sayhan
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    ABSTRACT: In this study, we compared the immunoreactivities of Bcl-2, Bax and p53 proteins in ovarian tumors and related the immunohistochemical findings to the histological type of the tumors. Formalin-fixed, paraffin wax-embedded tissue sections from 40 patients who had serous-mucinous borderline tumors and serous-mucinous adenocarcinoma of the ovary (n=10 each) were stained with hematoxylin-eosin (H&E). After histopathological examination, serial sections were stained immunohistochemically with primary antibodies to Bcl-2, Bax and p53 using an avidin-biotin-peroxidase method. A semi-quantitative grading system was used to compare the immunohistochemical staining intensities. The nuclear DNA fragmentation of apoptosis was determined using TUNEL method. As a result of immunohistochemical staining, increased immunoreactivity of Bcl-2 was observed in adenocarcinomas when compared to borderline tumors (P<0.001). Strong immunoreactivity of Bcl-2 and mild immunoreactivities of Bax and p53 were detected in ovarian adenocarcinomas. There were no significant statistical differences in the immunoreactivity of Bax among the histological type of ovarian tumors. Whereas a balance was observed between the immunoreactivities of Bcl-2 and Bax in the borderline cases, and this balance was strongly changed toward the anti-apoptotic Bcl-2 protein in patients with adenocarcinoma. TUNEL staining of sections indicated apoptotic cells in the serous borderline tumors were about 8-fold higher than in the serous adenocarcinoma. The results of this study on apoptosis-related factors might help to develop novel protective and therapeutic approaches, such as isoflavonoids and isothiocyanates, which were associated with decreased Bcl-2/Bax ratio, against the malignant epithelial ovarian tumors.
    Acta Histochemica 08/2014; 116(8). DOI:10.1016/j.acthis.2014.07.007 · 1.76 Impact Factor
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    ABSTRACT: Objective To analyze the expression patterns of extracellular signal-regulated kinase (ERK1/2) and phosphorylated (p)-AKT in the tissues of non-pathologic endometrium, endometrial hyperplasia, and early and advanced stage endometrioid endometrial adenocancer using indirect immunohistochemistry, and also to investigate the effect of ERK1/2 and p-AKT expression patterns on prognosis in endometrioid adenocancer. Study design Immunolocalization of ERK1/2 and p-AKT was examined in six different types of endometrial tissues: proliferative endometrium (PE; n = 10, 11.2%), secretuar endometrium (SE; n = 10, 11.2%), simple hyperplasia (SH; n = 15, 16.9%), complex hyperplasia (CH; n = 3, 3.4%) and atypical complex hyperplasia (ACH; n = 10, 11.2%), which were obtained from endometrial biopsies, curettage materials, and hysterectomy specimens and classified as the benign group; and both early stage endometrioid (n = 21, 23.6%) and advanced stage endometrioid adenocancer (AC; n = 20, 22.5%), which were obtained from complete surgical staging materials and classified as the malignant group. All specimens were fixed in 10% formalin and processed using routine paraffin protocols. Immunostaining intensities were evaluated as negative or weak (assigned as low expression) and moderate or strong (assigned as high expression). Results In the malignant group, 23 of 41 patients (56.1%) had high ERK1/2 and p-AKT expression, whereas only three of 48 patients in the benign group (6.3%) had high ERK1/2 and p-AKT expression (P < 0.0001 and P < 0.0001, respectively). p-AKT expression was significantly higher in women with positive lymph nodes (OR 9.0; 95% CI: 1.2–100.0; P = 0.03). Higher expression of p-AKT was significantly associated with poor progression-free survival (PFS) and overall survival (OS). In contrast, ERK1/2 expression was not associated with PFS or OS. Conclusions ERK1/2 and p-AKT can be useful in the differential diagnosis of benign vs. malignant endometrial lesions, as well as early vs. advanced stage endometrioid endometrial adenocancer. Additionally, higher p-AKT expression could be used as a marker of poor prognosis in the management of patients with endometrioid endometrial adenocancer.
    European Journal of Obstetrics & Gynecology and Reproductive Biology 08/2014; 179(Aug):147-52. DOI:10.1016/j.ejogrb.2014.05.040 · 1.63 Impact Factor
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    ABSTRACT: Malakoplakia is a rarely seen inflammatory condition that is considered to develop secondary to a chronic Escherichia coli infection. Although malakoplakia usually affects the genitourinary tract, it may also be observed in the colon, stomach, lungs, liver, bones, uterus, and skin. Malakoplakia of the genitourinary system usually involves the bladder, whereas it may also affect the prostate along with the bladder. Malakoplakia of the prostate is very rare, and it may be clinically mistaken for prostatic malignancies. Definitive diagnosis is only possible through histopathological examination. This study elaborates on two patients who presented to our hospital in 2013 with high PSA levels. The primary clinical consideration was prostate carcinoma. However, these two cases were diagnosed as malakoplakia based on the results of histopathological analysis of the transrectal prostate biopsy specimen.
    04/2014; 2014:150972. DOI:10.1155/2014/150972
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    ABSTRACT: Transforming growth factor β (TGF-β) and Smads control intracellular signaling pathways in neurulation. Although previously reported similar experimental animal studies, the aim of this human study is to investigate the expression of TGF-β (1,2,3) and Smads (1,2,3,6,7) in aborted human fetuses with myeloschisis. MATERIAL and Twelve human fetuses with neural tube defect were obtained. They were stained with antibodies against TGF-β1, TGF-β2, TGF-β3, Smad (1,2,3), Smad 6 and Smad 7 using the indirect immunohistochemical technique. We noted mild immune reactivity of TGF-β1 and TGF-β2 in the open neural plate, motor neurons and surrounding tissue. Strong immune reactivity of TGF-β3 was shown in only open neural plate and surrounding tissue. Immunoreactivity of all Smads noted negative except Smad7. These results suggested at the site where the neural tube failed to close, TGF-β 1,2 and Smads 1,2,3,6 do not continue their activity and decrease with internal timing of embryonic development. Additionally ectodermal layers are considered by embryo as "not closed wound" and TGF-β3 activity may be an effort to repair the failed closure.
    Turkish neurosurgery 11/2013; 23(6):693-9. DOI:10.5137/1019-5149.JTN.9428-13.0 · 0.53 Impact Factor
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    ABSTRACT: AIm: Transforming growth factor β (TGF-β) and Smads control intracellular signaling pathways in neurulation. Although previously reported similar experimental animal studies, the aim of this human study is to investigate the expression of TGF-β (1,2,3) and Smads (1,2,3,6,7) in aborted human fetuses with myeloschisis. mAterIAl and methOds: Twelve human fetuses with neural tube defect were obtained. They were stained with antibodies against TGF-β1, TGF-β2, TGF-β3, Smad (1,2,3), Smad 6 and Smad 7 using the indirect immunohistochemical technique. results: We noted mild immune reactivity of TGF-β1 and TGF-β2 in the open neural plate, motor neurons and surrounding tissue. Strong immune reactivity of TGF-β3 was shown in only open neural plate and surrounding tissue. Immunoreactivity of all Smads noted negative except Smad7. COnClusIOn: These results suggested at the site where the neural tube failed to close, TGF-β 1,2 and Smads 1,2,3,6 do not continue their activity and decrease with internal timing of embryonic development. Additionally ectodermal layers are considered by embryo as " not closed wound " and TGF-β3 activity may be an effort to repair the failed closure. ÖZ AmAÇ: Transforming growth factor beta (TGF-β) ve Smad'lar nörülasyonda hücre içi sinyal yolaklarını kontrol ederler. Daha once yayınlamış benzer deneysel hayvan çalışmaları olmasına rağmen bu insan çalışmasının amacı, medikal abortus yaptırılmış myeloşizisli insan fetuslerinde TGF-β (1,2,3) ve Smad'ların (1,2,3,6,7) ekspresyonunu incelemektir. yÖntem ve GereÇler: On iki tane nöral tüp kapanma kusurlu insan fetusu elde edildi. Örnekler, TGF-β1, TGF-β2, TGF-β3, Smad (1,2,3), Smad6 and Smad7 antikorları ile indirekt immünohistokimya tekniği kullanılarak boyandı. BulGulAr: Açık nöral plak, motor nöronlar ve çevre dokularda TGF-β1 ve TGF-β2' ye ait hafif immün reaktivite saptandı. TGF-β3' e ait güçlü immün reaktivite sadece açık nöral plakta ve çevre dokusunda saptandı. Smad7 hariç tüm smad'ların immün reaktivitesi negatif saptandı. sOnuÇ: Bu sonuçlar nöral tüp kapanmasının başarısız olduğu bölgede TGF-β1,2 ve Smad 1,2,3 ve 6'nın aktivitesine devam etmediği ve embriyonik yaşla birlikte azaldığını düşündürdü. Buna ek olarak, ektodermal katlar embriyo tarafından " kapanmamış bir yara " olarak kabul edildiği ve TGF-β3 aktivitesinin bu kapanma kusurunun tamiri için gösterilen bir çaba olabileceği düşünüldü. AnAhtAr sÖZCÜKler: İnsan fetusu, Neural tüp defekti, TGF-βs, Smad
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    ABSTRACT: Primary signet-ring cell carcinoma (SRCC) of the breast is an uncommon variant, accounting for 2-4.5% of all primary breast cancers. Secondary SRCC of the endometrium is very rare and usually originates from the breast or gastrointestinal tract. A 54-year-old, postmenopausal woman with a past history of breast cancer four years previously was admitted with abnormal uterine bleeding. An endometrial biopsy revealed undifferentiated adenocarcinoma with signet-ring cells. The patient underwent laparotomy and cytoreductive surgery was performed. Pathological analysis and immunohistochemical tests demonstrated a uterine (endomyometrial) metastasis of breast SRCC. Omentum, peritoneal surfaces and retroperitoneal lymph nodes also included tumoral tissue with signet-ring cell morphology. The patient received adjuvant systemic chemotherapy with adriamycin, cyclophosphamide and paclitaxel. This case report discusses the patient's clinical characteristics and the role of cytoreductive surgery on patient survival in SRCC of the breast metastasizing to the uterus.
    Journal of Obstetrics and Gynaecology Research 04/2012; 38(6):948-52. DOI:10.1111/j.1447-0756.2011.01807.x · 0.93 Impact Factor
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    ABSTRACT: To evaluate the accuracy of a frozen section and to analyze the factors affecting frozen section results in cases of borderline ovarian tumors (BOTs). The files and pathological reports of 82 cases diagnosed with BOT at our clinic, between January 1994 and June 2009, have been retrospectively evaluated. The frozen section results were compared to the permanent paraffin section results. Accuracy, overdiagnosis, and underdiagnosis rates were estimated. The factors affecting the diagnosis were also evaluated using logistic regression analysis. The mean age was 40.16 ± 14.01 years. Of the patients, 47.6% had serous and 42.7% had mucinous histology. About 90% of the cases were in stage I. The rate of correct diagnosis with frozen section was 69.5%. The rates of overdiagnosis and underdiagnosis were 1.2 and 29.3%; respectively. The factors affecting the diagnosis were determined as, the dimension of the ovarian mass (P = 0.005), presence of a solid component (P = 0.000), preoperative CA 125 value (P = 0.016), and intraoperative rupture of the ovarian cyst (P = 0.049). In the frozen section evaluation of BOTs, the underdiagnosis that restricts the diagnostic performance of the method seems to be a major problem. A more careful approach is therefore needed, while choosing a proper surgical technique during laparotomy for ovarian masses. In order to reduce the false diagnosis and surgical morbidity, the frozen section analysis should be applied by experienced pathologists and the possible predictive factors affecting a false diagnosis should carefully be taken into consideration.
    Journal of cancer research and therapeutics 10/2011; 7(4):416-20. DOI:10.4103/0973-1482.92005 · 0.95 Impact Factor
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    ABSTRACT: Sirenomelia is a rare and lethal malformation. It has been considered as an extreme form of caudal regression syndrome. This sporadic defect occurs in approximately I in 60000 newborn infants and has male predominance. Maternal diabetes mellitus is accepted to be an important predisposing factor and urogenital, gastrointestinal, cardiopulmonary and central nervous system defects are seen together with the anomaly. In this case presentation, we reported three cases of sirenomelia with multiple organ malformations. Variety of the associated anomalies and the pathological features of these rare cases may enlighten diagnosis of similar cases.
    Turkiye Klinikleri Journal of Medical Sciences 08/2010; 30(4):1392-1394. DOI:10.5336/medsci.2008-8728 · 0.10 Impact Factor
  • Saudi medical journal 07/2009; 30(6):855-6. · 0.55 Impact Factor
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    ABSTRACT: Epidermal growth factor (EGF) and transforming growth factor-alpha (TGF-alpha) are members of the polypeptide growth factor family. The epidermal growth factor-receptor (EGF-R) is a receptor tyrosine kinase of the ErbB family. Many types of cancer, including ovarian cancer, display enhanced EGF-R immunoreactivity on their cell surface membranes. Also, an increase in TGF-alpha synthesis and secretion usually occurs in human carcinoma cell lines. In this study, we compared the immunoreactivities of TGF-alpha and EGF-R in ovarian tumors and related immunohistochemical findings to the histological type of the tumors. Formalin-fixed, paraffin wax-embedded tissue sections from 40 patients who had serous-mucinous borderline tumor and serous-mucinous adenocarcinoma of the ovary (n=10 each) were stained with hematoxylin-eosin and labeled for binding of primary antibodies against TGF-alpha and EGF-R using an avidin-biotin-peroxidase method. A semi-quantitative grading system was used to compare immunohistochemical labeling intensities. Increased immunoreactivity of EGF-R and moderate immunoreactivity of TGF-alpha was detected in adenocarcinomas. There was no significant difference in the immunoreactivity of TGF-alpha among the histologic types of ovarian tumors. The results of this study support the hypothesis that EGF-R may be a more useful marker than TGF-alpha in epithelial ovarian tumors.
    Acta Histochemica 02/2008; 110(3):256-63. DOI:10.1016/j.acthis.2007.08.007 · 1.76 Impact Factor
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    ABSTRACT: The aim of this study was to evaluate the usefulness of integrated 2-[18F] fluoro-2-deoxy-D-glucose positron emission tomography/computed tomography (PET/CT) for the detection of para-aortic nodal status and to test whether PET/CT change management strategy in locally advanced cervical cancer (LACC) patients with negative conventional CT findings. Sixteen locally advanced (FIGO stage IIB-IVA) cervical squamous cancer patients with negative conventional CT findings were eligible to enter this prospective study. All patients underwent firstly PET/CT scans then extraperitoneal surgical exploration for para-aortic lymphadenectomy. Based on histopathologic confirmation, the accuracy, sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of the PET/CT for para-aortic lymph node metastasis were estimated. The median age was 48.7 (range 42-67). The accuracy, sensitivity, specificity, PPV and NPV of the PET/CT were 75%, 50%, 83.3%, 50% and 83.3%, respectively. The treatment was modified in four of sixteen (25%) patients; four patients received EFRT in combination with cisplatin chemotherapy instead of standard pelvic field radiotherapy in combination with cisplatin chemotherapy. Our results, despite our study group is small, suggest that PET/CT is an effective imaging technique in the evaluation of LACC with negative CT findings. It may help planning the management especially selecting radiation field. However, larger controlled studies are needed to recommend PET/CT as an alternative to pre-treatment surgical staging.
    Gynecologic Oncology 02/2008; 108(1):154-9. DOI:10.1016/j.ygyno.2007.09.011 · 3.69 Impact Factor
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    ABSTRACT: Our objective was to investigate the relation between the embryological development and neural tissue maturation at the site where the neural plate failed to form a neural tube. Samples from 15 aborted human fetuses with neural tube defects (NTD). All of the fetuses were between 20 and 25 gestational weeks old. Indicators of neural tissue maturation, formation of basal lamina, expression of integrins and neuron specific class III beta tubulin (tuj1) were investigated. To detect the adverse effects of the environment, if any, p53 and bcl-2 activity at both sites of the open and closed neural plate were investigated as well. No difference was found in the expression of maturation-related molecules at the site of the neural plate that remained open compared with the site where the neural tube is normally formed. While high p53 activity was noted in neural tissue at the site of the neural tube defect, no such activity was detected in the neural tissue where the neural tube is normally formed. Our results suggested that maturation and differentiation of neural tissue continued regardless of the failure of neural tube closure. Therefore, the neurological deficits that are encountered in NTD patients should be related to secondary damage such as amnion fluid toxicity, uterus contractions, labor, etc. It seems valuable to save the neural plate before the negative effects of the environment renders the neural tissue functionless.
    Child s Nervous System 06/2004; 20(5):313-20. DOI:10.1007/s00381-004-0950-2 · 1.16 Impact Factor
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    ABSTRACT: Integrins are a large family of cell adhesion molecules that serve as receptors involved in cell-to-cell and cell-to-matrix interactions during implantation. We studied immunohistochemical staining of integrins (alpha 3, alpha V, beta 1, and alpha 2 beta 1) and fibronectin in ectopic tubal pregnancy. Thirty fallopian tube samples with ectopic pregnancies and five normal tubal segments were obtained during ligation operations; the latter specimens served as controls in the study. Formalin-fixed paraffin-embedded tissue sections were stained with hematoxylin-eosin or primary antibodies against alpha 3, beta 1, alpha V, and alpha 2 beta 1 integrins and fibronectin, using the avidin-biotin-peroxidase method. A semi-quantitative grading system was used to compare staining intensities. In the control samples, immunostaining of all integrins was found in a single layer of tall columnar epithelial cells, the lamina propria (Lp) and the muscular layer. Fibronectin staining was detected in the Lp and the muscular layer. Staining intensities of alpha 3 and beta 1 integrins and fibronectin were increased in the normal part of fallopian tubes with ectopic pregnancies. Staining of beta 1 integrin was more intense than staining of alpha 3 and fibronectin, whereas there was no difference in alpha V and alpha 2 beta 1 integrin expression between normal tubal tissue in the ectopic pregnancy group and control tubal tissue. In the tubal pregnancy group at the site of implantation, staining intensity of alpha 3 and beta 1 integrins and fibronectin was strong in decidual cells, supporting tissue and placental villi, whereas alpha V and alpha 2 beta 1 staining was mild. We concluded that integrins, especially beta 1 and alpha 3, and fibronectin may play a role in progression of tubal implantation. Although the role of integrins has not yet been clearly defined, these molecules may function as markers of normal and abnormal states of receptivity. We like to suggest that integrins and fibronectin, which are needed in utero implantation, are expressed in tubal tissues during ectopic pregnancy and are involved in ectopic implantation.
    Acta Histochemica 02/2004; 106(3):235-43. DOI:10.1016/j.acthis.2004.02.004 · 1.76 Impact Factor

Publication Stats

86 Citations
21.63 Total Impact Points

Institutions

  • 2014
    • Tepecik Teaching and Research Hospital
      Ismir, İzmir, Turkey
    • Tepecik Training and Research Hospital
      Ismir, İzmir, Turkey
  • 2008–2012
    • Izmir Bozkaya Research and Education Hospital
      Ismir, İzmir, Turkey