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Öğe Effect of Ankaferd blood stopper (R) on tendon healing: an experimental study in a rat model of Achilles tendon injury(TURKISH JOINT DISEASES FOUNDATION, 2015) Aydin, Bahattin Kerem; Altan, Egemen; Acar, Mehmet Ali; Erkocak, Omer Faruk; Ugras, SerdarObjectives: This in vivo study aims to investigate the effects of Ankaferd Blood Stopper (R) (ABS) which is a recently developed topical hemostatic agent on tendon healing using a rat Achilles tendon injury model. Materials and methods: Twelve male Wistar-Albino rats were used in the study. Right legs of the rats were assigned as the study group, and left legs were assigned as the control group. Under anesthesia, bilateral Achilles tendon injuries were created and repaired surgically. To the surgical sites, 1 mL of ABS for the right side and 1 mL of serum physiologic solution for the left side were applied. Animals were euthanized on the 21st postoperative day, and tendon samples were collected from the extremities. Histological analyses were performed according to the semiquantitative tendon scoring system (Bonar Scale). Results: Total tendon healing scores were significantly poorer in the study group compared to the control group. Although there were no significant differences between the groups in terms of tenocyte morphology, degree of ground substance staining, and vascularity, the collagen morphology scores were significantly poorer in the study group. Conclusion: In our study, application of ABS had histologically negative effect on tendon healing in rats. However, further biomechanical and immune histochemical studies are required to support these results.Öğe The effect of platelet-rich plasma on osteochondral defects treated with mosaicplasty(SPRINGER, 2014) Altan, Egemen; Aydin, Kerem; Erkocak, Omer; Senaran, Hakan; Ugras, SerdarPurpose This study investigated the efficacy of platelet-rich plasma (PRP) on articular surfaces on which the mosaicplasty technique was performed. Our hypothesis was that PRP can accelerate the osseointegration process and enhance the quality of articular integrity after the mosaicplasty procedure. Methods Standard defects were created in the femoral groove of both patellofemoral joints of 12 New Zealand rabbits. PRP solution was placed inside the defect before fixation of the osteochondral autografts and injected inside the involved joint after capsular closure of the tested knees. The contralateral knees served as the control sides. The animals were euthanized three or six weeks after mosaicplasty, and both limbs were assessed according to Pineda's histological grading scale. Significance level was set at p <= 0.05 a priori, and the Mann-Whitney U test was used for statistical analysis. Results Histologic findings at the interface between the transferred autograft and the original cartilage revealed better integration of the adjacent surfaces in the mosaicplasty with PRP group three weeks after the procedure; the difference was significant (p < 0.05). However, no significant difference in the transition zone was observed between the groups six weeks after the experiment (p = 0.59). Conclusions Our animal model showed that adjunctive use of PRP produced a better healing response and resulted in superior histological scores after three weeks compared with the mosaicplasty-only procedure. Interpretation of our results is important in terms of rapid return to previous activity levels. Thus, application of PRP can represent a valid therapeutic option for improving the efficacy of mosaicplasty by stimulating the local healing response.Öğe Effects of Prednisolone, l-Asparaginase, Gemfibrozil, and Combinations of These Elements on Mice Lipid Profile, Liver, and Pancreas(LIPPINCOTT WILLIAMS & WILKINS, 2016) Kose, Dogan; Tarakci, Nuriye; Celik, Zeliha Esin; Vatansev, Husamettin; Cimbek, Emine Ayca; Ugras, Serdar; Sen, YasarThe aim of this study is to determine the effects of l-asparaginase (l-ASP), corticosteroids (CSs), and antilipidemics, separately and in combination, on the lipid profiles and the liver and pancreas histology in mice. This study included 8 groups of 7 mice each. Before any drug administration, serum samples were taken from all of the mice. Then, normal saline was applied to the control group, and a medication or combination of medications was applied to the other groups. Levels of triglycerides, cholesterol (COL), and high-density lipoprotein (HDL) and low-density lipoprotein (LDL) were determined, and the livers and pancreases were evaluated histologically at the end of the study. Triglycerides increased significantly in the CS-only and the l-ASP-only groups, COL increased significantly in the CS-only group, and HDL increased significantly in the CS-only and the antilipidemic-only groups. LDL was significantly lower in the CS-only and the l-ASP-only groups. CSs and l-ASP were significantly effective in liver necrosis, l-ASP was significantly effective in liver balloon degeneration, and CS were significantly effective in pancreas vacuolization. Triglyceride measurement is recommended before/during CS and/or l-ASP treatment. Starting with an antilipidemic agent can be considered to avoid possible complications in patients with significantly high rates. Indicators of a possible liver or pancreas injury should also be considered.Öğe The evaluation of reliability and contribution of frozen section pathology to staging endometrioid adenocarcinomas(SPRINGER HEIDELBERG, 2015) Karabagli, Pinar; Ugras, Serdar; Yilmaz, Burcu Sanal; Celik, CetinTo evaluate the reliability and accuracy of intraoperative pathological findings, compared to permanent section (PS) and to understand contributions of frozen section (FS) to final staging in patients with endometrioid carcinomas. This is a retrospective analysis of 79 patients undergoing intraoperative FS and with endometrioid adenocarcinomas. Intraoperative pathological findings were compared with final results as to grade, depth of myometrial invasion (MI), cervical involvement, lymphovascular space invasion (LVSI) and stage. We also analyzed whether staging procedures like pelvic or para-aortic lymph node metastasis, peritoneal cytology and extension beyond of uterus were related to FS findings. Staging was based on the FIGO 2009. FS results were agreement in 89.9 % for grade, 88.6 % for depth of MI, 100 % for cervical invasion, and 92.4 % for LVSI, compared with PS. On FS, 12, 16.6 and 44.4 % of specimens in stages of IA, IB and II became upstaged in final pathology, respectively. Of 79 cases, 5 (6.3 %) were upstaged to IIIC1, and 3 (3.8 %) were upstaged to IIIC2 because of lymph node metastasis. A significant relationship was detected between lymph node metastasis, and FS grades (p = 0.001), LVSI (p = 0.000), cervical invasion (p = 0.006) and MI (p = 0.001). We consider that intraoperative FS is a useful procedure to identify poor prognostic pathological factors. While grading, depth of MI, cervical stromal invasion and LVSI on FS are significant in predicting lymph node metastasis, the existence of cervical stromal invasion and LVSI should be considered more effective parameters in the identification of metastatic endometrial cancer risks.Öğe Isolated Scrotal Skin Relapse in a Child with Burkitt Lymphoma(GALENOS YAYINCILIK, 2015) Kose, Dogan; Kivrak, Ali Sami; Ugras, Serdar; Koksal, YavuzBurkitt lymphoma (BL) that is the most rapidly growing human tumor is an aggressive B-cell neoplasia. It generally occurs as an extranodal disease. Its metastasis into extranodal areas is also frequent, however, its cutaneous involvement is rare. An 11-year-old male presented with the complaints of abdominal pain and difficulty in swallowing. The patient was diagnosed with BL by trucut biopsy that was performed for a mass identified in the left upper abdominal quadrant and B-cell Non-Hodgkin's lymphoma (NHL) BFM 95 treatment protocol was applied. The patient applied again for the complaint of right scrotal swelling 1.5 months after the completion of therapy. On physical examination, right scrotal edema and redness were identified. The patient was diagnosed with relapsed BL by biopsy taken from scrotal skin and LMB-Group C treatment protocol was applied. The patient came again with the complaints of abdominal swelling and pain 20 months after the completion of therapy. On physical examination, a mass was detected in the left mid-upper quadrant of the abdomen. The result of biopsy was reported as BL again and COPM (cyclophosphamide, vincristine, prednisolone, and methotrexate) treatment protocol and rituximab were started. However, central nervous system (CNS) relapse developed and the patient was lost. This case was presented because isolated scrotal skin relapse has not been reported in the literature.Öğe Neurothekeoma in childhood: a benign tumor mimicking malignant disease(TURKISH J PEDIATRICS, 2014) Kose, Dogan; Ugras, Serdar; Harmankaya, Ismail; Ciftci, Ilhan; Koksal, YavuzNeurothekeoma (NT) sometimes extends to subcutaneous adipose tissue, skeletal muscle or epidermis, and thus may imitate some malignant situations. A 17-year-old female patient was admitted to another medical center with a swelling at her waistline. Plexiform fibrous histiocytoma was diagnosed, and she was referred to our clinic. Total re-excision was performed. The new pathology report indicated features of atypical NT. A case of atypical NT, which can be misdiagnosed as a malignant mesenchymal tumor, is discussed in this paper.Öğe Nicotinamide N-methyltransferase expression and its association with phospho-Akt, p53 expression, and survival in high-grade endometrial cancer(TUBITAK SCIENTIFIC & TECHNICAL RESEARCH COUNCIL TURKEY, 2019) Akar, Serra; Harmankaya, Ismail; Ugras, Serdar; Celik, CetinBackground/aim: Nicotinamide N-methyltransferase (NNMT) is an enzyme that is overexpressed in malignancies. NNMT expression has not been previously studied in endometrial cancer (EC). Increased phospho-Akt (pAkt) levels in response to NNMT overexpression have been reported in in vitro studies of different cancer types. We assayed NNMT expression in primary and metastatic high-grade EC and investigated the relationship of NNMT with p53, pAkt, and survival. Materials and methods: NNMT, pAkt, and p53 expressions were assayed in 100 tissue samples of benign endometria, primary EC, and metastatic EC by immunohistochemistry. Results: The NNMT immunoreactivity score was significantly higher in primary high-grade EC than benign endometrial tissue (P = 0.001). NNMT expression in metastatic tissue was significantly higher than in primary cancer (P < 0.001). Metastatic stromal NNMT expression was significantly higher than that of the adjacent tumor and stroma adjacent to the primary tumor. p53 expression in the primary tumor showed a significant positive correlation with omental NNMT and pAkt expression. NNMT expression was also correlated with pAkt expression in metastatic tissue. NNMT overexpression in metastatic tissue was associated with decreased survival (P = 0.039). Conclusion: This study suggests that NNMT may promote cancer progression and that NNMT overexpression is associated with aberrant p53 expression, pAkt, and poor survival. NNMT's role in cancer progression could make it a target of EC therapy.Öğe Pilomatrixoma in childhood(MEDKNOW PUBLICATIONS & MEDIA PVT LTD, 2014) Kose, Dogan; Ciftci, Ilhan; Harmankaya, Ismail; Ugras, Serdar; Caliskan, Umran; Koksal, YavuzContext: Pilomatrixoma is a benign tumor of the skin. Malignant transformation can be seen rarely in the small percentage. Aim: The aim of the following study is to attract attention to this tumor in the differential diagnosis because if it is not kept in mind it leads to both unnecessary interventions and treatments for the patient. Patients and Methods: From January 2006 to December 2012, 8 patients with pilomatrixoma were evaluated retrospectively. Results: A total of 8 pediatric pilomatrixoma patients charts were reviewed retrospectively. None of the patients had familial feature. Of 8 patients 4 (50%) were male and 4 (50%) were female. The patients age ranged from 2-18 years with a median age 11.5 years. All of the patients were admitted with the complaint of swelling at the lesion site. Two patients have multiple lesions, one of them has two and other has three lesions. A total of 11 lesion were detected in our 8 patients that 5 of them were located upper extremities (46%), 3 of them cervical region (27%), 2 of them on occipital region (18%) and 1 of them in the sacral region (9%). All lesions were excised completely. Until now, no patient had evidence of recurrence or malignant disease. Conclusion: As a result pilomatrixoma is a benign tumor, with atypical forms and unfortunately, no tumor-specific diagnostic feature except of a careful histopathological examination is available.Öğe Synovial sarcoma in a premature newborn(WILEY-BLACKWELL, 2014) Kose, Dogan; Annagur, Ali; Erol, Cengiz; Ugras, Serdar; Koksal, YavuzSynovial sarcoma is rarely detected in infants, with an annual incidence of 0.5 per million. Synovial sarcoma occurs more frequently in adolescents and young adults, with the majority of patients presenting between 15 and 40 years of age. It is extremely rare, however, in pediatric patients under 2 years of age. In the present study we examined a 3-day-old male infant born at 32 weeks who had a mass on his left arm. Synovial sarcoma was identified on histopathological and immunohistochemical analysis of biopsy material acquired from the mass. On whole body magnetic resonance imaging, diffuse metastases were detected in the bilateral lungs in the retroperitoneal zone, in bilateral suprarenal glands, the right liver lobe, the right kidney, and the brain. To our knowledge this is the youngest patient to be diagnosed with synovial sarcoma in the literature.
