Person: GÜZEL, MEHMET
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Publication Open Access The Role of C-Reactive Protein in the Early Prediction of Serious Pancreatic Fistula Development after Pancreaticoduodenectomy(2018-01-01T00:00:00Z) MALYA, Fatma Ümit; Hasbahceci, Mustafa; Tasci, Yunus; KADIOĞLU, HÜSEYİN; GÜZEL, Mehmet; Karatepe, Oguzhan; DOLAY, Kemal; MALYA, FATMA ÜMİT; KADIOĞLU, HÜSEYİN; GÜZEL, MEHMET; DOLAY, KEMALIntroduction. Despite recent advances in surgical techniques, pancreatic fistulas are common. We aimed to determine the role of C-reactive protein in the prediction of clinically relevant fistula development. Materials and Methods. Data from patients who underwent pancreaticoduodenectomy between 2012 and 2015 is collected. Postoperative 1st, 3rd, and 5th day (POD1, POD3, and POD5) C-reactive protein (CRP) levels, postoperative pancreatic fistula (POPF) development, other complications, length of hospital stay, and mortality were recorded. Results. Of 117 patients, 43 patients (36.8%) developed complications (including fistulas). Of the patients developing fistulas, 21 (17.9%) had POPF A, 2 (1.7%) had POPF B, and 7 (6.0%) had POPF C. POD5 CRP and POD3 CRP were shown to be significantly correlated with mortality and development of clinically relevant POPF (p = 0 001 and p = 0 0001, resp.) and with mortality (p = 0 017), respectively. The development of clinically relevant POPFs (B and C) could be predicted with 90% sensitivity and 82.2% specificity by POD5 CRP cut-off level of 19 mg/dL and with 100% sensitivity and 63.6% specificity by the difference between POD5 and POD1 CRP cut-off level of > 2.5 mg/dL. Conclusion. CRP levels can effectively predict the development of clinically relevant pancreatic fistulas.Publication Metadata only Videoendoscopic pilonidal sinus surgery: early results with a new technique(2017-12-01) Kunduz, ENVER; Idiz, Ufuk Oguz; Aysan, Erhan; Güzel, MEHMET; Yapalak, YUNUS; Başköy, LÜTFULLAH; KUNDUZ, ENVER; GÜZEL, MEHMET; YAPALAK, YUNUS; BAŞKÖY, LÜTFULLAHWe adapted a laparoscopic surgical technique to sacrococcygeal pilonidal sinus disease (SPSD) treatment.Publication Open Access The role of PET and MRI in evaluating the feasibility of skin-sparing mastectomy following neoadjuvant therapy.(2018-02-01) MALYA, FATMA ÜMİT; KADIOGLU, HÜSEYİN; BEKTASOGLU, HÜSEYİN KAZIM; Gucin, ZÜHAL; YILDIZ, S; GUZEL, MEHMET; ERDOGAN, EZGİ BAŞAK; YUCEL, S; ERSOY, YELİZ EMİNE; MALYA, FATMA ÜMİT; KADIOĞLU, HÜSEYİN; BEKTAŞOĞLU, HÜSEYİN KAZIM; GÜCİN, ZÜHAL; YILDIZ, ŞEYMA; GÜZEL, MEHMET; ERDOĞAN, EZGİ BAŞAK; ERSOY, YELIZ EMINEAbstract Objective: To investigate the role of positron emission tomography (PET) and magnetic resonance imaging (MRI) in evaluating the feasibility of skin-sparing mastectomy in patients with locally-advanced breast cancer (LABC) who will undergo neoadjuvant chemotherapy (NAC) by evaluating the sensitivity and specificity of PET and MRI compared with skin biopsy results before and after NAC treatment. Methods: Patients with LABC who were treated with NAC between November 2013 and November 2015 were included in this study. Demographic, clinical, radiological and histopathological features of the patients were recorded. Results: A total of 30 patients were included in the study with a mean age of 52.6 years (range, 35– 70 years). Sensitivity and specificity for detecting skin involvement in LABC was 100%/10% (62%/ 85%) with MRI and 60%/80% (12%/92%) with PET before (after) NAC, respectively. When radiological skin involvement was assessed in relation to the final histopathological results, the preNAC PET results and histopathological skin involvement were not significantly different; and there was no difference between postNAC MRI and histopathological skin involvement. Conclusions: As preNAC PET and postNAC MRI more accurately determined skin involvement, it might be possible to use these two radiological evaluation methods together to assess patient suitability for skin-sparing mastectomy in selected patients.Publication Open Access The correlation between breast cancer and urinary iodine excretion levels(2018-02-01) Malya, FATMA ÜMİT; Kadioglu, HÜSEYİN; Hasbahçeci, Mustafa; Dolay, KEMAL; Guzel, MEHMET; Ersoy, YELİZ EMİNE; MALYA, FATMA ÜMİT; KADIOĞLU, HÜSEYİN; DOLAY, KEMAL; GÜZEL, MEHMET; ERSOY, YELIZ EMINEObjective To compare urinary iodine excretion levels in patients with breast cancer and control subjects. Methods In this prospective pilot study, patients with breast cancer and normal controls were recruited. Age and menopausal status were recorded. Levels of serum thyroid-stimulating hormone, blood urea nitrogen and creatinine and urine iodine concentration (UIC) were measured. UIC levels were divided into three categories: low (<100 µg/l), normal (100-200 µg/l) or high (>200 µg/l). Results A total of 24 patients with breast cancer and 48 controls were included in the study. There were no statistically significant differences between the two groups with regard to thyroid-stimulating hormone, blood urea nitrogen or creatinine levels. When considered overall, there was no statistical difference in UIC between patients and controls. However, comparisons within each category (low, normal or high UIC) showed a significantly higher percentage of patients with breast cancer had a high UIC compared with controls. Conclusions A high UIC was seen in a significantly higher percentage of patients with breast cancer than controls. UIC may have a role as a marker for breast cancer screening. Further studies evaluating UIC and iodine utilization in patients with breast cancer are warranted.Publication Metadata only Kolorektal Kanserin Karaciğer Metastazı: Laparoskpik Meatstazektomi(2015-04-04) MALYA, FATMA ÜMİT; Taşçı, YUNUS; HASBAHCECI, Mustafa; KUNDUZ, ENVER; GÜZEL, MEHMET; Ayşan, MUSTAFA ERHAN; MALYA, FATMA ÜMİT; KUNDUZ, ENVER; GÜZEL, MEHMET; AYŞAN, MUSTAFA ERHANPublication Open Access Use of serum and peritoneal CEA and CA19-9 in prediction of peritoneal dissemination and survival of gastric adenocarcinoma patients: are they prognostic factors?(2018-04-01) HASBAHCECI, MUSTAFA; Malya, FATMA ÜMİT; Kunduz, ENVER; Guzel, MEHMET; Unver, NURCAN; Akcakaya, ADEM; MALYA, FATMA ÜMİT; KUNDUZ, ENVER; GÜZEL, MEHMET; ÜNVER, NURCAN; AKÇAKAYA, ADEMINTRODUCTION To evaluate the impact of serum and peritoneal levels of tumour markers on peritoneal carcinomatosis and survival in gastric adenocarcinoma. MATERIALS AND METHODS Patients with gastric adenocarcinoma were evaluated with regard to serum and peritoneal carcinoembryonic antigen (CEA) and CA19-9. Numeric values and groupings based on serum and peritoneal cutoff values were used. Development of peritoneal carcinomatosis, including positive washing cytology, was regarded as main outcome. Gastric cancer outcomes as disease free and overall survival were analysed. RESULTS There were 67 patients with a mean age of 60 ± 11 years. Positive peritoneal washing cytology was significantly associated with serum CA19-9 and high serum CA 19–9 group (P = 0.033 and P = 0.011, respectively). High peritoneal CEA was shown to be significantly associated with peritoneal carcinomatosis (P = 0.032). After a median follow up of 17 months, 48 patients (71.7%) were alive. Patients with peritoneal carcinomatosis showed significant poorer prognosis as shown by overall survival rate of 28.6%. Only serum CEA was significantly associated with lower disease free and overall survival (P = 0.002 and P = 0.001, respectively). DISCUSSION AND CONCLUSION Serum CEA is shown to be significantly associated with poor prognosis for gastric cancer patients. Serum level of CA19-9 and high peritoneal CEA levels are significant predictors for positive peritoneal washing cytology and the development of peritoneal carcinomatosis, respectively. Therefore, the possible impact of serum and peritoneal tumor markers especially on the staging and prognosis of gastric cancer remains to be clarified by future studies.