Person: ÇELİKEL, ÇİĞDEM
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ÇELİKEL
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ÇİĞDEM
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Publication Open Access Stage IV Hodgkin's disease presenting with spinal epidural involvement and cauda equina compression as the initial manifestation: Case report(1997-10-01) ÇELİKEL, ÇİĞDEM; Toprak A., Kodalli N., Alpdogan T., Giral A., Celikel Ç., Gurmen N., Bayik M.Hodgkin\"s disease very rarely presents clinically, initially with a paraspinal mass, but this should be considered in the differential diagnosis. A patient presenting with back pain was diagnosed to have Stage IV Hodgkin\"s disease. MRI revealed an extradural and intraspinal soft tissue mass with bone infiltration. The importance of MRI in the early evaluation of a paraspinal mass and in determining the extent of the disease is emphasized.Publication Open Access Evaluation of mucosal status in the follow-up of pediatric patients with celiac disease: the role of serology(2022-09-01) AY, NADİYE PINAR; ERTEM ŞAHİNOĞLU, DENİZ; ÇELİKEL, ÇİĞDEM; Sengul O. K., Akkelle B. S., Ay P., Volkan B., Tutar E., Celikel Ç., Ertem D.Recent guidelines suggest non-biopsy serology-based approach for the diagnosis of celiac disease; however, there is no evidence-based data regarding noninvasive follow-up of mucosal healing. The aim of this study is to investigate the efficacy of serology in reflecting mucosal status in the follow-up of pediatric patients with celiac disease. This is a validation study conducted at a university hospital. Patients who had biopsy proven celiac disease (Marsh III) at diagnosis, and had been followed-up for at least 12 months, were prospectively evaluated with duodenal biopsies. tTG-IgA and EMA tests were performed on the day of endoscopy. One hundred four patients with a mean age of 7.4 +/- 4.02 years were included in the study. The sensitivity and specificity of tTG-IgA were 85.2% and 61% respectively, with a high negative predictive value (NPV) of 92.2% but a very low positive predictive value (PPV) of 43.4%. We found that a cutoff value of 68.5 U/mL for tTG-IgA had a sensitivity, specificity of 85.2% and 85.7% respectively. The AUC was 0.891. The sensitivity and specificity of EMA was 77.8% and 87% respectively, with a high NPV of 91.8% but low PPV of 67.7%.Publication Open Access Prognostic significance of metastatic lymph node ratio in gastric cancer: a Western-center analysis(2023-08-01) UPRAK, TEVFİK KIVILCIM; AKIN, MUHAMMED İKBAL; ÇELİKEL, ÇİĞDEM; YEGEN, ŞEVKET CUMHUR; ERGENÇ, MUHAMMER; Ergenç M., Uprak T. K., Akın M. İ., Hekimoğlu E. E., Çelikel Ç., Yegen Ş. C.BackgroundTumor-node-metastasis (TNM) staging is the central gastric cancer (GC) staging system, but it has some disadvantages. However, the lymph node ratio (LNR) can be used regardless of the type of lymphadenectomy and is considered an important prognostic factor. This study aimed to evaluate the relationship between LNR and survival in patients who underwent curative GC surgery.MethodsAll patients who underwent radical gastric surgery between January 2014 and June 2022 were retrospectively evaluated. Clinicopathological features of tumors, TNM stage, and survival rates were analyzed. LNR was defined as the ratio between metastatic lymph nodes and total lymph nodes removed. The LNR groups were classified as follows: LNR0 = 0, 0.01 < LNR1 ≤ 0.1, 0.1 < LNR2 ≤ 0.25 and LNR3 > 0.25. Tumor characteristics and overall survival (OS) of the patients were compared between LNR groups.ResultsAfter exclusion, 333 patients were analyzed. The mean age was 62 ± 14years. According to the LNR classification, no difference was found between groups regarding age and sex. However, TNM stage III disease was significantly more common in LNR3 patients. Most patients (43.2%,n = 144) were in the LNR3 group. In terms of tumor characteristics (lymphatic, vascular, and perineural invasion), the LNR3 group had significantly poorer prognostic factors. The Cox regression model defined LNR3, TNM stage II—III disease, and advanced age as independent risk factors for survival. Patients with LNR3 demonstrated the lowest 5-year OS rate (35.7%) (estimated mean survival was 30 ± 1.9months) compared to LNR 0–1–2.ConclusionOur study showed that a high LNR was significantly associated with poor OS in patients who underwent curative gastrectomy. LNR can be used as an independent prognostic predictor in GC patients.Publication Open Access Diagnosis and treatment of autoimmune hepatitis: Questions, answers, and illustrative cases: endorsed by autoimmune liver diseases special interest group, Turkish association for the study of liver(2023-11-01) ÇELİKEL, ÇİĞDEM; Özaslan E., Günşar F., ÇİFCİBAŞI ÖRMECİ A., Hatemi İ., Efe C., AKYOL G., Turhan N., Barbet F. Y., SAĞOL Ö., Ataizi Çelikel Ç., et al.Autoimmune hepatitis (AIH) is a rare, immune-mediated liver disease. It has a heterogeneous nature with varied clinical presentations. The management of patients with AIH is challenging in many ways. The main difficulties are inexperience due to the rarity of the disease, diagnostic confusion in controversial areas such as variant/overlap cases, acute presentations, the presence of non-alcoholic fatty liver disease or drug-induced liver injury features, and the long and complex course of treatment. Here, we provide a clear, concise, and visualized review regarding the diagnosis and treatment of AIH, including illustrative cases.Publication Open Access Foregut duplication cyst of the stomach(2008-10-01) ÇELİKEL, ÇİĞDEM; YEGEN, BERRAK; Sever Z. T., Sen L., Celikel Ç., YEGEN B.Foregut duplication cyst of the stomach is an extremely rare disease entity. A 35-year-old Korean man presented with epigastric pain. An abdominal cystic mass, measuring 7 ¥ 6 ¥ 5 cm, was found in the lesser curvature of the stomach. The cyst was unilocular with a grey-white, rubbery wall. Microscopically, the cyst wall was lined by pseudostratified ciliated, columnar epithelium and gastric mucosa with a complete lining of smooth muscle bundles. Although the origin of this lesion remains uncertain, this case suggests that the gastric cyst arose from the embryonic foregut and showed differentiation toward respiratory and gastric structures.Publication Open Access "Russell body" gastritis: A case report(2010-01-01) ÇELİKEL, ÇİĞDEM; KAYA, HANDAN; Midi A., Celikel Ç., KAYA H.Our case was a 50-year-old female who presented at the outpatients department with dyspeptic symptoms. Microscopical examination of mucosal samples from the corpus and antrum showed widespread Helicobacter pylori within the superficial mucus network, marked neutrophilic cryptitis, widespread reactive/regenerative crypt hyperplasia, intestinal metaplasia, and increased lymphoplasmocytoid cells and plasma cells full of immunoglobulin in the lamina propria. Immunohistochemical staining showed the plasma cells to be CD3 (-), CD20 (-), CD79a (+), CD45 (+), Kappa (+), and Lambda (+). It is possible for a dense accumulation of Russell bodies to be observed on a background of H. pylori taking into account that Russell bodies contain immunoglobulin aggregates and side products of immunoglobulin synthesis. However, there are only a limited number of articles evaluating this aspect. We present a case to contribute to the few articles on Helicobacter gastritis characterized by an inflammatory reaction rich in ‘’Russell’’ bodiesPublication Open Access Prognostic significance of mucinous histology in metastatic colorectal cancer patients treated with regorafenib(2023-01-01) ARIKAN, RUKİYE; DEMİRCAN, NAZIM CAN; YAŞAR, ALPER; SEVER, NADİYE; ÇELİKEL, ÇİĞDEM; SARI, MURAT; KÖSTEK, OSMAN; BAYOĞLU, İBRAHİM VEDAT; ARIKAN R., Üstün H. S., Demircan N. C., Işik S., Telli T. A., Yaşar A., Çelebi A., Majidova N., Sever N., ÇELİKEL Ç., et al.Objective: Prognostic factors for regorafenib therapy have not been fully defined. Mucinous adenocarcinoma (MAC) is a dis-tinct subtype of colorectal cancer (CRC). We investigated the significance of mucinous histology in patients treated with regorafenib for metastatic CRC (mCRC). Material and Methods: In this retrospective study, patients were stratified according to the presence of mucinous histology; >1% extracellular mucin was defined as mucinous component adenocarcinoma (MCAC), and containing no mucin was defined as non-MAC. The prognostic significance of mucinous histology for progression-free survival (PFS) and overall survival (OS) was evaluated by univariate and multivariate analyses. Results: A total of 103 patients were included, including 20 (19.4%) patients with MCAC and 83 (80.6%) patients with non-MAC. The median follow-up time was 8.6 months (range 1.8-31.6 months). The median PFS was lower in cases with MCAC than those with non-MAC (3.2 months vs. 3.6 months, respectively, p=0.01). Median OS was lower in MCAC patients than in non-MAC patients (4.3 months vs. 9.6 months, respectively, p=0.008). In multivariate analyses, mucinous histology was an independent risk factor [haz-ard ratio (HR): 2.2, p=0.003] for PFS and Eastern Cooperative Oncology Group-Performance Status (HR: 2.2, p=0.01), cancer antigen 19-9 (HR: 1.7, p=0.03), and mucinous histology (HR: 1.9, p=0.02) were independent risk factors for OS. Conclusion: This study revealed the prognostic value of mucinous histology in mCRC patients treated with regorafenib. Consideration of histologic features may be helpful in se-lecting patients for regorafenib therapy.Publication Open Access Multimodality imaging findings of visceral myopathy in a child presenting with palpable abdominal mass(2019-01-01) ÇELİKEL, ÇİĞDEM; BAYRAMOĞLU Z., Yilmaz R., Demir A. A., Ataizi-Celikel Ç., Kombak F. E., Ikinci A., Yekeler E.Visceral myopathy is a rare cause of intestinal obstruction characterized by intestinal dysmotility and constipation. Patients often present with recurrent abdominal pain, vomiting and abdominal distension. We report a rare case of visceral myopathy in a child presenting with intraabdominal mass. We aimed to describe ultrasound, computed tomography and magnetic resonance enterography findings of this rare disease that has not been demonstrated before. Differential diagnosis of mural thickening with distinguishable layers in addition to intestinal dilatation in the absence of mesenteric inflammation includes visceral myopathy.Publication Open Access Malign melanom, endobronşial metastaz(2009-04-09) KOCAKAYA, DERYA; OLGUN YILDIZELİ, ŞEHNAZ; ERYÜKSEL, SEMİHA EMEL; ÇELİKEL, ÇİĞDEM; KARAKURT, SAİT; Kocakaya D., Abul Y., Olgun Yıldızeli Ş., Eryüksel S. E., Tosuner Z., Yazıcı Z., Çelikel Ç., Karakurt S.Amaç: Malign melanoma melanositlerin malign transfomayonu sonucu gelişir.Pulmoner metastazını pulmoner arterlere ulaşan tümör embolileri yoluyla yapar.Endobronşial yayılımlı malign melonom vakaları sınırlı sayıdadır. Gereç ve Yöntem: Nadir görülen endobronşial yayılım yapmış bronkoskopi ile tanı koyduğumuz vakamızı sunduk. Bulgular: 42 yaşında bayan hasta nefes darlığı şikaye ile başvurdu. 2006 da tanı konan sır a konjenital dev nevüs tanısı mevcu u.5 paket/yıl sigara hikayesi mevcu u. Fizik muayenede bel bölgesinde 25x15 cm boyularında yaklaşık tüm lumbar bölgeyi kaplayan gluteal bölgeye de yayılan dev nevüsü mevcu u. Vücu a özellikle sır a ve saçlı deride birden fazla çok sayıda nevüsler izlendi. Nevüslerde renk değişikliği tariflemiyordu. Sır aki dev nevüste kalınlaşma belir yordu. Solunum sistemi muayenesi doğaldı.Aksiller ele gelen 1x2 cm lik lenfadenopa si mevcu u. PA akciğer grafisinde sol hilar bölgede düzensizlik ve dansite ar şı mevcu u. Toraks BT’de sol üst lobda 40x30 mm kitlesel lezyon mevcu u. Bronkoskopide sol akciğer üst lob girişinde nevüs tarzında siyahımsı mukozadan kabarık endobronşial lezyon izlendi. Alınan bronkoskopik biyopsi, rça ve bronkoalveolar lavaj materyalleri malign melonom ile uyumlu geldi. Sonuç: Malign melanoma bağlı endobronşial metastaz nadirdir. Literatürde 1966-2002 yılları arası yapılmış geniş taramada 204 akciğer dışı kaynaklı endobronşial metastaz vakası saptanmış olup bunları sırasıyla meme(%35), böbrek(%17), kolon ve rektum(%15) oluşturmaktadır.. Deri kanseri vakaları sadece 9 vaka olup , 7’si malign melanom kökenli saptanmış r. Tanıda primer akciğer kanserinden ayırtetmek için bronkoskopi şar r. Malign melannomaya bağlı endobronşial metastazı olgumuzu literatürde nadir görülmEsi nedeniyle sunduk.Publication Open Access Sıçanlarda whey proteini ile oluşturulan glutatyon önkoþullandırmasının karaciğer sıcak iskemi/reperfüzyon hasarında hem oksijenaz-1 sistemi üzerine etkisi(2008-09-01) GÜLLÜOĞLU, MAHMUT BAHADIR; ÇELİKEL, ÇİĞDEM; Manukyan M. N., Yavuz Y., Erbarut I., Ogunc A. V., Ataizi-Celikel Ç., Yalcin A. S., GÜLLÜOĞLU M. B.Purpose: Oxygen radicals which are produced during reperfusion phase play a central role for hepatocellular damage during ischemia/reperfusion (I/R) injury. Antioxidant strategies appear a promising approach to prevent I/R injury. In the present study, the effect of glutathione (GSH) preconditioning established by whey protein feeding on hepatocellular injury markers was assessed in a rat hepatic normothermic I/R injury model. The interaction between intracellular GSH content and heme oxygenase-1 (HO-1) enzyme expression was also determined in order to understand the level of upgrading of HO-1 system in a high GSH content environment after preconditioning.