Person: BOZKURT, SÜHEYLA
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BOZKURT
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SÜHEYLA
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Publication Metadata only Immunohistochemical expression of SPARC is correlated with recurrence, survival and malignant potential in meningiomas(WILEY, 2009) BOZKURT, SÜHEYLA; Bozkurt, Suheyla Uyar; Ayan, Erdogan; Bolukbasi, Fatihhan; Elmaci, Ilhan; Pamir, Necmettin; Sav, AydinMeningioma is a common neoplasm that constitutes almost 30% of all primary central nervous system tumors and is associated with inconsistent clinical outcomes. The extracellular matrix proteins play a crucial role in meningioma cell biology and are important in tumor cell invasion and in progression to malignancy. SPARC (secreted protein, acidic and rich in cysteine) (osteonectin) is a matricellular glycoprotein that regulates cell function by interacting with different extracellular matrix proteins. The aim of this study was to evaluate the expression of SPARC with proliferation index, p53 reactivity in WHO grade 1 (benign), grade 2 (atypical) and grade 3 (anaplastic) meningiomas and correlate with clinical features of the patients, including location of the tumor, recurrence of the tumor and survival of patients. We studied 111 meningiomas, 69 being benign, 34 being atypical and eight being anaplastic meningiomas of various histological types. Using immunohistochemical analysis, we evaluated the expression of SPARC, Ki-67 (MIB-1) and p53 in meningiomas. Immunohistochemical scores of SPARC were determined as the sum of frequency (0-3) and intensity (0-3) of immunolabeling of the tumor cells. A high immunohistochemical score (4-6) for SPARC was more frequent in atypical and in anaplastic meningiomas than in benign meningiomas (p < 0.01). MIB-1 proliferation index showed significant association between tumor grades in meningiomas (p < 0.01). At the end of a follow-up period of 47.53 +/- 25.04 months, 30 tumors recurred. A high SPARC expression was significantly associated with tumor recurrence (p = 0.02). The immunoreactivity of p53 protein and MIB-1 score were significantly higher in recurrent meningiomas than in non-recurrent meningiomas. The cumulative survival of patients with high SPARC expression was significantly lower than patients with low SPARC expression. The high SPARC expression scores were predominantly identified in meningothelial, fibrous and chordoid meningiomas; low SPARC expression scores were mostly spotted in secretory and psammomatous meningiomas. Evaluating SPARC expression might help assessing recurrence risk and survival estimation in meningiomas.Publication Metadata only Apocrine carcinomas of the breast in Turkish women: Hormone receptors, c-erbB-2 and p53 immunoexpression(ELSEVIER GMBH, 2008) KAYA, HANDAN; Kaya, Handan; Bozkurt, Sueheyla Uyar; Erbarut, Ipek; Djamgoz, Mustafa B. A.The aims of this study were twofold: (i) to determine the occurrence frequency of apocrine carcinoma of the breast (ApBCa) in Turkish breast cancer (BCa) patients; and (ii) to evaluate the expression of estrogen receptor (ER), progesterone receptor (PR), androgen receptor (AR), gross cystic disease protein-15 (GCDFP-15), c-erbB-2, and p53 in these cases. Six hundred and twenty-six cases of BCa were studied immunohistochemically (streptoavidin-biotin horseradish peroxidase method). The results of ApBCa were compared with those of invasive ductal carcinoma not otherwise specified type (IDC-NOS) cases of similar grade. Thirteen cases of ApBCa were encountered, accounting for 2.1% of all BCa cases. Immunohistochemically, ApBCa positivity was as follows: GCDFP-15 (100%), ER (39%), PR (8%), AR (54%), p53 (39%), and c-erbB-2 (85%). In the IDC-NOS group, GCDFP-15* was expressed in less than 50% of the tumors. The occurrence frequencies of the other markers were as follows: ER (69%), PR (69%)*, AR (46%), c-erbB-2 (0%)*, and p53 (31%), (*) indicating significant differences between the two groups. For Turkish BCa patients, (i) the occurrence rate of ApBCa (2.1%) was high; and (ii) the following combination would allow for an immunohistochemical identification of ApBCa: GCDFP-15(+), c-erbB-2(+), and PR-. (C) 2008 Elsevier GmbH. All rights reserved.Publication Open Access Indefinite Azacitidine Treatment Until Progression May Provide Long-Term Disease Control in Elderly Patients with Acute Myelogenous Leukemia(AVES, 2018-09-21) BOZKURT, SÜHEYLA; Eser, Ali; Sezgin, Aslihan; Kara, Osman; Uyar Bozkurt, SuheylaThe prognosis of acute myelogenous leukemia (AML) is poor in elderly patients. The mean survival rates at second and fifth years for AML were 10% and 2%, respectively. Here our aim was to demonstrate that the survival rate can be prolonged by long-term azacitidine (AZA) treatment. Complete remission was achieved at the end of the fourth and sixth courses of AZA treatment in three elderly patients with AML with a high blast count. The first patient was followed without any treatment after getting complete remission with four courses of AZA, and at the end of 1 year follow-up, the patient died due to pneumonia. Complete remission was obtained in the second and third patients after four and six courses of AZA, respectively. Second patient is still being followed up in complete remission at the end of the 20th course of AZA. Recurrence occurred at the end of the 16th AZA course in the third patient and he died after 20 months of the treatment. In elderly patients with AML with a high blast count, the continuation of AZA treatment improves the overall survival rates.Publication Metadata only Presence of high grade tertiary Gleason pattern upgrades the Gleason sum score and is inversely associated with biochemical recurrence-free survival(ELSEVIER SCIENCE INC, 2013) BOZKURT, SÜHEYLA; Turker, Polat; Bas, Emine; Bozkurt, Suheyla; Gunlusoy, Bulent; Sezgin, Arsenal; Postaci, Hakan; Turkeri, LeventObjectives: Tumor heterogeneity is a common finding and led to realization of a tertiary Gleason component (TGC) in prostate cancer. In an attempt to further investigate its prognostic value, we analyzed the association of tertiary Gleason pattern in Gleason score <= 7 tumors with pathologic stage and biochemical disease-free survival. Material and methods: A total of 331 radical prostatectomy specimens were analyzed retrospectively. The primary, secondary, and the tertiary patterns were evaluated by reviewing all of the pathologic slides. TGC was defined as Gleason grade pattern 4 or 5 for Gleason score <7 tumors and Gleason grade pattern 5 for Gleason score 7 tumors. The pathologic prognostic factors, (extraprostatic extension, seminal vesicle and lymph node invasion, surgical margin status) of Gleason score <7, 3+4, and 4+3 tumors with or without TGC were compared. Biochemical recurrence-free survival (BRFS) was calculated using Kaplan-Meier method with log rank test, and the influence of TGC was assessed in a Cox regression model. Results: TGC observed more frequently with higher Gleason scores (21% of the GS <7 cases, 23% of the GS 3+4 cases, and 58% of the GS 4+3 cases). In terms of adverse pathologic prognostic factors and BRFS, GS <7 tumors with TGC behaved significantly worse than GS <7 tumors without TGC (P = 0.01 and P = 0.001, respectively) with properties similar to GS 3+4 tumors without TGC. Gleason score 3+4 and 4+3 tumors without TGC were statistically similar and had better features than corresponding tumors of same Gleason score with TGC. Furthermore, Gleason score 7 tumors with TGC had similar features with GS 8-10 tumors. During follow-up, 73 (22%) subjects had PSA recurrence. In the Cox regression model TGC was an independent variable for BRFS (BR = 2.63, 95% CI = 1.39-4.98, P = 0.003). Conclusion: According to the present study, 3 different prognostic groups were observed; good prognostic group: GS <7, intermediate prognostic group: GS <7+TGC, GS 3+4, and GS 4+3, and finally bad prognostic group: GS (3+4)+TGC, GS (4+3)+TGC, GS >7. Presence of a TGC appears to upgrade the total score and adjuvant treatment decisions may further be refined by considering the tertiary pattern. (C) 2013 Elsevier Inc. All rights reserved.Publication Metadata only Malignancy and lymphoid proliferation in primary immune deficiencies; hard to define, hard to treat(WILEY, 2020) KOÇ, AHMET; Kiykim, Ayca; Eker, Nursah; Surekli, Ozlem; Nain, Ercan; Kasap, Nurhan; Akturk, Hacer; Dogru, Omer; Canbolat, Aylin; Somer, Ayper; Koc, Ahmet; Tokuc, Gulnur; Bozkurt, Suheyla; Turkoz, Kemal; Karakoc-Aydiner, Elif; Ozen, Ahmet; Baris, SafaBackground Regarding the difficulties in recognition and management of the malignancies in primary immune deficiencies (PIDs), we aimed to present the types, risk factors, treatment options, and prognosis of the cancers in this specific group. Methods Seventeen patients with PID who developed malignancies or malignant-like diseases were evaluated for demographics, clinical features, treatment, toxicity, and prognosis. Results The median age of malignancy was 12.2 years (range, 2.2-26). Lymphoma was the most frequent malignancy (n = 7), followed by adenocarcinoma (n = 3), squamous cell carcinoma (n = 2), cholangiocarcinoma (n = 1), Wilms tumor (n = 1), and acute myeloid leukemia (n = 1). Nonneoplastic lymphoproliferation mimicking lymphoma was observed in five patients. The total overall survival (OS) was 62.5% +/- 12.1%. The OS for lymphoma was 62.2% +/- 17.1% and found to be inferior to non-PID patients with lymphoma (P = 0.001). Conclusion In patients with PIDs, malignancy may occur and negatively affect the OS. The diagnosis can be challenging in the presence of nonneoplastic lymphoproliferative disease or bone marrow abnormalities. Awareness of susceptibility to malignant transformation and early diagnosis with multidisciplinary approach can save the patients' lives.Publication Open Access Expression and prognostic significance of cox-2 and p-53 in hodgkin lymphomas: a retrospective study(BMC, 2010-12) BOZKURT, SÜHEYLA; Barisik, Nagehan O.; Bozkurt, Suheyla; Gumus, Mahmut; Kaygusuz, Isik; Karadayi, Nimet; Bas, Emine; Bayik, Mahmut; Tecimer, TulayBackground: Cyclooxygenase (cox) is the rate-limiting enzyme, which catalyzes the conversion of arachidonic acid into prostaglandins and contributes to the inflammatory process. Cyclooxygenase-2 (cox-2), which is one of the two isoforms, plays a role in tumor progression and carcinogenesis. p53 contributes to apoptosis, DNA renewal and cell cycle. Studies concerning the relationship of cox-2 and p53 expressions and carcinogenesis are available, but the association between cox-2 and p53 in Hodgkin lymphoma (HL) is not exactly known. In our study, we examined the association of cox-2 and p53 expression, with age, stage, histopathological subtype, and survival in HL. We also examined correlation between cox-2 and p53 expression. Methods: Cox-2 and p53 expressions in Hodgkin-Reed Sternberg cells (HRS) were examined in 54 patients with HL depending on cox-2 expression, stained cases were classified as positive, and unstained cases as negative. Nuclear staining of HRS cells with p53 was evaluated as positive. The classifications of positivity were as follows: negative if<10%; (1+) if 10-25%; (2+) if 25-50%; (3+) if 50-75%, (4+) if >75%. Results: Cox-2 and p53 expressions were found in 49 (80%) and 29 (46%) patients, respectively. There were differences between histological subtypes according to cox-2 expression (p = 0.012). Mixed cellular (MC) and nodular sclerosing (NS) subtypes were seen most of the patients and cox-2 expression was evaluated mostly in the mixed cellular subtype. There were no statistically significant relationships between p53 and the histopathological subtypes; or between p53, cox-2 and the factors including stage, age and survival; or between p53 and cox-2 expression (p > 0.05). Conclusion: Considering the significant relationship between the cox-2 expression and the subtypes of HL, cox-2 expression is higher in MC and NS subtypes. However the difference between these two subtypes was not significant. This submission must be advocated by studies with large series