Publications by authors named "Mustafa Olmez"

12 Publications

  • Page 1 of 1

Impact of Subclinical Rejection on Kidney Graft Function.

Transplant Proc 2019 Dec 13;51(10):3304-3308. Epub 2019 Nov 13.

Kent Hospital, Department of General Surgery, Izmir, Turkey.

Background: In kidney transplant recipients with borderline infiltration, protocol biopsy results demonstrated the relationship with chronic injury. The purpose of this study was to evaluate the effect of subclinical rejection (SCR) on 6-month protocol biopsy results in long-term renal function in renal transplant recipients with stable graft function.

Material And Methods: Transplant protocol biopsies performed in 45 patients with stable renal function were included in this study at 6 months. Biopsy specimens were evaluated for SCR. Study groups were divided into patients with and without SCR. Renal functions were compared with pathologic evaluation. The effect of immunosuppressive regimens on renal function were evaluated in patients with SCR RESULT: The median age of patients was 32 years (range, 18-64 years). The median follow-up was 56 months (range, 24-84 months). According to the 6-month protocol biopsy results, 20 of 45 patients (44.4%) met SCR criteria based on Banff 07 parameters. There was not a statistically significant difference in renal function with SCR.

Conclusion: The presence of SCR on the 6-month protocol biopsy results in renal transplant recipients with a stable graft function does not cause deterioration in the long-term graft function.
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http://dx.doi.org/10.1016/j.transproceed.2019.08.036DOI Listing
December 2019

Outcomes of patients with advanced stage ovarian cancer with intestinal metastasis.

Ginekol Pol 2017 ;88(10):537-542

Objectives: The aim of this study is to evaluate the results of advanced stage (stage IIIB-IVB) ovarian cancer (OC) patients with intestinal metastasis, and to investigate the factors that affect survival.

Material And Methods: Patients who underwent cytoreductive surgery (CS) for FIGO stage IIIB-IVB OC with metastasis in the intestinal system, at Tepecik Research and Treatment Hospital between 2008-2014, were analyzed retrospectively. Patients with borderline ovarian tumor; those who had previously undergone radiation therapy and/or hysterectomy and patients having secondary or tertiary cytoreduction were excluded and 49 patients were included and analyzed in this study. Hysterectomy, bilateral salpingo-oopherectomy, pelvic and para-aortic lymph node sampling, resection of bulky lymph nodes and omentectomy were performed. Optimal cytoreduction was accepted as that which left residual tumor ≤ one cm maximum size.

Results: The risk factors affecting OS interval were investigated according to Cox' regression analysis. Optimality of the primary CS (P = 0.008 and HR = 5.202) and cancer stage (P = 0.016 and HR = 6.083) were found to be statistically significant factors.

Conclusions: Achieving optimal CS is the most important aim for the general surgeon carrying out an intestinal resection procedure. Although resection procedures are superior in providing the desired optimal results when compared to excision surgery, their higher complication rates and subsequent lower quality of life must be taken into consideration when choosing either resection or excision methods; surgical intervention should always be kept to the minimum possible.
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http://dx.doi.org/10.5603/GP.a2017.0098DOI Listing
July 2018

Pediatric small bowel transplantation: A single-center experience from Turkey.

Turk J Gastroenterol 2016 Sep;27(5):428-432

Department of Organ Transplantation and General Surgery, Sağlık Bilimleri University İzmir Tepecik Training and Research Hospital, İzmir, Turkey.

Background/aims: Small bowel transplantation (SBTx) is a treatment option for patients with serious parenteral nutrition-related problems in intestinal failure. İzmir Tepecik Training Research Hospital Organ Transplantation Center is still the only pediatric intestinal transplant center in Turkey.

Material And Methods: This study was approved by the local ethics committee. Patients' data were analyzed from the medical charts and the hospital digital database. Seven isolated SBTxs were performed in six children between 2010 and 2016.

Results: One jejunal segment and six partial jejuno-ileal segments were used for seven transplants. All grafts were retrieved from deceased donors (one child and six adult donors). The six recipients had a mean age of 8.8±6.9 years (9 months to 17 years; M: 4, F: 2). The mean follow-up period of patients was 727±848 (34 to 1950) days. Acute cellular rejection (ACR) rates were 57% (n: 4) in the first 2 months. Graft loss due to severe ACR was seen in one patient. Central line-associated fungal (n: 3, 42%) and bacterial infections (n: 3, 42%) were seen in the first 2 months. Two Epstein-Barr virus (EBV) infections were recorded between 3 and 8 months in two patients. Our 1-year patient and graft survival rates were 71% and 71%, respectively.

Conclusion: SBTx has become a treatment modality for patients with intestinal failures. Management of ACR and infections are still challenging problems in SBTx. Appropriate-sized cadaveric donors are very limited in Turkey for pediatric intestinal transplantation candidates. Although the number of SBTxs performed was small, this study shows promising results.
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http://dx.doi.org/10.5152/tjg.2016.16385DOI Listing
September 2016

Delayed Graft Function in Kidney Transplantation: Risk Factors and Impact on Early Graft Function.

Prog Transplant 2016 Jun 6;26(2):172-7. Epub 2016 Apr 6.

Tepecik Training and Research Hospital, Department of Transplantation and General Surgery, Izmir, Turkey.

Context: Although kidney transplantations are routinely performed at many centers in Turkey, the incidence and risk factors associated with delayed graft function (DGF) here have not yet been well defined.

Objective: The aim of this study is to evaluate the incidence and risk factors of DGF and its impact on early graft function.

Design: The medical charts of 154 adult patients who underwent deceased donor kidney transplantation between 2000 and 2014 in a single center were reviewed retrospectively.

Setting: Delayed graft function-related risk factors for donors, recipients, and the transplant surgery itself were analyzed, and their relation with graft function was evaluated.

Main Outcomes Measures: The median recipient age was 39 years. The median cold ischemia time (CIT) was 840 minutes (14 hours). The incidence of DGF and acute rejection were 57.8% and 8.4%, respectively. Higher serum creatinine levels at 3, 6, and 12 months were observed in patients with DGF compared to other patients without DGF (P < .05). Patients with DGF had poor graft function (glomerular filtration rate ≤ 50) at 3 and 6 months (P < .05), but these correlations were not seen at 12 months (P = not significant).

Results: This study showed that DGF was a common and serious problem associated with poor graft functions at 3, 6, and 12 months after transplantation. Extra effort to shorten CIT as an independent risk factor for DGF could have protective effect on graft functions.
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http://dx.doi.org/10.1177/1526924816640978DOI Listing
June 2016

Primary Gastric Invasive Micropapillary Carcinoma: A Case Report.

Turk Patoloji Derg 2015 ;31(3):219-22

Department of Pathology, Bozyaka İzmir Training and Research Hospital, İZMİR, TURKEY.

Invasive micropapillary carcinoma is a recently identified neoplasm. A 77-year-old-female was admitted to the hospital due to progressive loss of weight and nausea. Endoscopic biopsy of the antral/prepyloric located mass was diagnosed as moderately differentiated adenocarcinoma. Subtotal gastrectomy and regional lymph node resection were performed. The tumor was composed of moderately differentiated cells arranged in micropapillary structures with only a few poorly formed glandular foci in lamina propria. Immunohistochemically, neoplastic cells of micropapillary and focal conventional adenocarcinoma areas were diffusely positive for pancytokeratin, cytokeratin 7 and epithelial membrane antigen. In micropapillary areas, membranous and peripheral cytoplasmic positivity with epithelial membrane antigen in outside of the cell clusters called "inside-out polarity" pattern that is characteristic for invasive micropapillary carcinoma were seen. Invasive micropapillary carcinoma is very rare in the stomach in the English literature.
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http://dx.doi.org/10.5146/tjpath.2014.01246DOI Listing
October 2016

Retroperitoneal paraganglioma presenting with pancytopenia: A rare case with rare manifestation.

Int J Surg Case Rep 2015 28;14:77-9. Epub 2015 Jul 28.

Tepecik Education and Research Hospital, Department of General Surgery, İzmir, Turkey.

Introduction: Paragangliomas are tumors that arise from extraadrenal chromaffin cells and most of them are asymptomatic presenting with painless mass. Retroperitoneal paragangliomas are mostly benign with good prognosis; however, they can present with abdominal pain, palpable mass, or hypertensive episodes. Surgical resection is still the main treatment and necessary for histological assessment.

Case Report: A 41 year old female patient presented with 6 months of loss of appetite, weight loss, weakness and breathlessness on exertion.. The patient's initial blood examination showed marked anemia, reduced leukocyte count with neutropenia and lymphopenia and a marked reduction in the platelet count. The patient was admitted for evaluation of her pancytopenia. Magnetic resonance imaging revealed a 8×7×8cm sized mass closed to the pancreatic tail invading splenic hilum. A large mass was identified retroperitoneally, closed to the tail of pancreas with a splenic hilum invasion. Total mass resection and splenectomy was performed.

Discussion: Complete surgical excision is the treatment of choice for extra-adrenal paragangliomas as well as for recurrent or metastatic neoplasms. Reactive thrombocytosis is a common cause of thrombocytosis. Splenectomy was found to be one of the main causes of extreme reactive thrombocytosis. Reactive thrombocytosis is a predictable finding after splenectomy and management of the thrombocytosis and prevention of complications should be initiated.
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http://dx.doi.org/10.1016/j.ijscr.2015.07.021DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4573608PMC
September 2015

Mesenchymal stem cell therapy in patients with small bowel transplantation: single center experience.

World J Gastroenterol 2014 Jul;20(25):8215-20

Sait Murat Doğan, Selçuk Kılınç, Eyüp Kebapçı, Cem Tuğmen, Mustafa Ölmez, Cezmi Karaca, Organ Transplantation Center, SB Tepecik Teaching and Research Hospital, 35121 Izmir, Turkey.

Aim: To study the effects of mesenchymal stem cell (MSC) therapy on the prevention of acute rejection and graft vs host disease following small bowel transplantation.

Methods: In our transplantation center, 6 isolated intestinal transplants have been performed with MSC therapy since 2009. The primary reasons for transplants were short gut syndrome caused by surgical intestine resection for superior mesenteric artery thrombosis (n = 4), Crohn's disease (n = 1) and intestinal aganglionosis (n = 1). Two of the patients were children. At the time of reperfusion, the first dose of MSCs cultured from the patient's bone marrow was passed into the transplanted intestinal artery at a dose of 1000000 cells/kg. The second and third doses of MSCs were given directly into the mesenteric artery through the arterial anastomosis using an angiography catheter on day 15 and 30 post-transplant.

Results: The median follow-up for these patients was 10.6 mo (min: 2 mo-max: 30 mo). Three of the patients developed severe acute rejection. One of these patients did not respond to bolus steroid therapy. Although the other two patients did respond to anti-rejection treatment, they developed severe fungal and bacterial infections. All of these patients died in the 2(nd) and 3(rd) months post-transplant due to sepsis. The remaining patients who did not have acute rejection had good quality of life with no complications observed during the follow-up period. In addition, their intestinal grafts were functioning properly in the 13(th), 25(th) and 30(th) month post-transplant. The patients who survived did not encounter any problems related to MSC transplantation.

Conclusion: Although this is a small case series and not a randomized study, it is our opinion that small bowel transplantation is an effective treatment for intestinal failure, and MSC therapy may help to prevent acute rejection and graft vs host disease following intestinal transplantation.
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http://dx.doi.org/10.3748/wjg.v20.i25.8215DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4081695PMC
July 2014

S-shaped wide excision with primary closure for extensive chronic pilonidal sinus disease.

Case Rep Surg 2014 2;2014:451869. Epub 2014 Jun 2.

Department of General Surgery Clinic, Tepecik Teaching and Research Hospital, Izmir, Turkey.

Background. The management of complex pilonidal sinus disease (PSD) with multiple pits on and beside the natal cleft is variable, contentious, and problematic. Wide excision of the sinus and reconstruction of the defect using different flap techniques have become more popular in recent years. Case Report. We report a case with a complex chronic PSD to which we applied primary closure after S-shaped wide excision. The patient's postoperative course was uneventful, and at the end of one-year followup he is now disease-free and comes for routine checkups. Conclusion. The simplicity of the technique and the promising results support the applicability of the S-shaped wide excision in chronic bilaterally extended large PSDs. Further studies entailing large patient populations are needed to reach a definite conclusion.
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http://dx.doi.org/10.1155/2014/451869DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4060288PMC
July 2014

Isolated metastasis of uterine leiomyosarcoma to the pancreas: Report of a case and review of the literature.

Int J Surg Case Rep 2014 18;5(7):350-3. Epub 2014 Apr 18.

T.C.S.B. Tepecik Teaching and Research Hospital, Department of Pathology, Izmir, Turkey.

Introduction: Metastatic tumors of the pancreas are uncommon and rarely detectable clinically. Metastases to the pancreas are rare. We present a patient with pancreatic metastases from a leiomyosarcoma of the uterus and review the literature about the clinical features of pancreatic metastasis and its surgical management.

Presentation Of Case: A 40-year-old woman, who underwent hysterectomy, left oophorectomy, omentectomy and lymp node dissection for leiomyosarcoma of the uterus. At the follow up, the patient complained of non-specific abdominal discomfort. Preoperative diagnosis were pancreatic pseudocyst, cystadenoma or cystadenocarcinoma. At laparotomy, a cystic mass was found in the tail of the pancreas which was invased to the transverse colon mesenterium and the spleen. Distal pancreatectomy with splenectomy and transverse colon resection was performed. Histologically, the tumor was evaluated as poorly differentiated leiomyosarcoma.

Discussion: Metastatic lesions of the pancreas are uncommon and less than 2% of all pancreatic malignancies. However a few cases of leiomyosarcoma with metastases to the pancreas have been reported in the literature. Before deciding that the lesion in the pancreas was metastasis, primary leiomyosarcoma of the pancreas had to be ruled out. Histologically, leiomyosarcoma of the pancreas contains interlacing spindle cells with varying degrees of atypia and pleomorphism. The surgical approach to the pancreatic metastases must be aimed complete excision of the tumor with a wide negative margin of clear tissue and maximum preservation of pancreatic remnant if possible.

Conclusion: In the absence of widespread metastatic disease, aggressive surgical approach with negative margins must be aimed.
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http://dx.doi.org/10.1016/j.ijscr.2014.04.016DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4064381PMC
June 2014

Isolated retroperitoneal hydatid cyst invading splenic hilum.

Case Rep Surg 2014 26;2014:303401. Epub 2014 Mar 26.

Department of General Surgery Clinic, T.C.S.B. Tepecik Teaching and Research Hospital, 35110 Izmir, Turkey.

Introduction. Hydatid disease (HD) is an infestation that is caused by the larval stage of Echinococcus granulosus. The liver is affected in approximately two-thirds of patients, the lungs in 25%, and other organs in a small proportion. Primary retroperitoneal hydatid cyst is extremely rare. The most common complaint is abdominal pain; however, the clinical features of HD may be generally dependent on the location of the cyst. Case Presentation. A 43-year-old female was admitted with the complaint of abdominal pain. Her physical examination was normal. Computed tomography (CT) revealed a 17 × 11 cm cystic lesion, with a thick and smooth wall that is located among the left liver lobe, diaphragm, spleen, tail of the pancreas, and transverse colon and invading the splenic hilum. Total cystectomy and splenectomy were performed. Pathological examination was reported as cyst hydatid. Discussion. Cysts in the peritoneal cavity are mainly the result of the spontaneous or traumatic rupture of concomitant hepatic cysts or surgical inoculation of a hepatic cyst. Serological tests contribute to diagnosis. In symptomatic and large hydatid peritoneal cysts, surgical resection is the only curative treatment. Total cystectomy is the gold standard. Albendazole or praziquantel is indicated for inoperable and disseminated cases. Percutaneous aspiration, injection, and reaspiration (PAIR) technique is another nonsurgical option.
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http://dx.doi.org/10.1155/2014/303401DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3984763PMC
May 2014

Endometriosis of the terminal ileum: a diagnostic dilemma.

Case Rep Pathol 2012 11;2012:742035. Epub 2012 Sep 11.

Department of Third General Surgery Clinic, Tepecik Teaching and Research Hospital, Gaziler Cad. Number: 468, Tepecik Eğitim ve Araştırma Hastanesi, Yenisehir, 35110 Izmir, Turkey.

Endometriosis is characterized by the presence of endometrial tissue consisting of glands and/or stroma located outside the uterus. Involvement of the terminal ileum is extremely rare. Preoperative distinction of ileal endometriosis from other diseases of the ileocecal region is difficult in terms of clinical presentation, symptomatology, radiological appearance, and surgical and pathological findings. We report a case initially diagnosed as Crohn's disease due to a longstanding diarrhea with subsequent intestinal obstruction, but finally diagnosed as ileal endometriosis by histopathological evaluation after resection of the involved segment.
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http://dx.doi.org/10.1155/2012/742035DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3446655PMC
September 2012

Effective weight control and normalization of metabolic parameters after laparoscopic sleeve gastrectomy: a single center experience.

Hepatogastroenterology 2013 Mar-Apr;60(122):368-71

Third General Surgery Clinic, Tepecik Teaching and Research Hospital, Izmir, Turkey.

Background/aims: Obesity is one of the most serious public health problems. Laparoscopic sleeve gastrectomy (LSG), a type of bariatric surgery, is emerging as the new promising therapy for the treatment of morbid obesity.

Methodology: In the present study we aimed to assess the effects of LSG on body weight and other obesity related pathological conditions.

Results: A total of 19 obese subjects underwent LSG surgery. All patients underwent complete evaluation including anthropometric/clinical parameters and laboratory tests. Hypertension (HT), diabetes mellitus (DM), body mass index (BMI), and hyperlipidemia were significantly reduced after LSG.

Conclusions: Results of this study demonstrate that LSG induces stable weight loss and resolution of obesity-associated comorbidities.
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http://dx.doi.org/10.5754/hge12566DOI Listing
August 2013
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