Arda Yavuz

Istanbul Medeniyet Universitesi · Department of Gastroenterology

Ulcerative colitis (UC) is a chronic inflammatory disease of the colon. Different indices to evaluate the severity of UC include CBC, ESR, CRP, fecal calprotectin, and clinical grading systems such as Mayo score. Recently, systemic immune-inflammation index (SII) defined as platelet x neutrophil/lymphocyte, was found as an effective immune-inflamma...

Background/Aims: Ulcerative colitis (UC) is a chronic inflammatory disease of the colon. Different indices to evaluate the severity of UC include CBC, ESR, CRP, fecal calprotectin, and clinical grading systems such as Mayo score. Recently, systemic immune-inflammation index (SII), defined as platelet x neutrophil/lymphocyte, was found as an effecti...

Aims: Our aim was to evaluate the risk of unnecessary endoscopic retrograde cholangiopancreatography (ERCP) in patients with suspected common bile duct (CBD) stones before the procedure. Methods: In a retrospective single-center study, we investigated the ERCP records between 12.2016- 04.2021. 30 patients with malignancy were excluded. All patients...

Aims: Our aim was to predict the malignancy in patients with cholestasis before ERCP. Methods: In a retrospective single-center study, we investigated the ERCP records of patients between 12.2016- 04.2021. All patients had abdominal imaging before the ERCP. Laboratory parameters were derived at the time of admission. Statistical analyses were perf...

Background: Updated Sydney system (USS) recommends taking biopsies from certain areas of the stomach for the diagnosis of precancerous lesions associated with Helicobacter pylori. Our aim was to evaluate the contribution of each of the biopsy sites to the diagnosis. Methods: This prospective study included 97 patients aged 40 and over with dyspe...

Parvovirus B19 infection is usually self-limiting in immunocompetent individuals. Twenty-five percent of infected individuals are completely asymptomatic during infection, with 50% of them presenting flu-like symptoms and the remaining patients presenting erythema infectiosum, arthralgia, or arthritis. More rarely, transient aplastic crisis is seen...

Chronic pancreatitis (CP) is a progressive inflammatory disease with several complications. Endoscopic methods make essential contributions to diagnosis and treatment. Endoscopic ultrasound is considered the most sensitive method for diagnosing early CP. Symptoms related to CP, failure of medical therapy, pancreatic changes in imaging (obstructive...

This study aims to assess the predictive value of indices such as FIB-4 score, APRI score, platelet count/spleen diameter ratio, spleen size, portal vein diameter, MELD score, Child score, and laboratory parameters on the presence of bleeding within two months after EVL in the cirrhotic patient.

Our aim was to predict the malignancy in patients with cholestasis before ERCP.

Aims: This study aims to assess the predictive value of indices as FIB-4 score, APRI score, platelet count/spleen diameter ratio, spleen size, portal vein diameter, MELD score, Child score, laboratory parameters on the presence of bleeding within two months after EVL in the cirrhotic patient. Methods: We retrospectively reviewed endoscopy reports...

Foreign body ingestion and food impaction are frequent in clinical practice. Foreign body ingestion mainly occurs in the pediatric population. In adults, bolus food impaction is more common than true foreign body ingestion. Rectal foreign bodies are frequently seen in male adults. Flexible endoscopy is an effective treatment modality with high succ...

Acute abdominal pain, approximately 8% of the emergency room admissions, is a clinical condition requiring algorithmic approaches due to wide range of differential diagnosis. Rapid diagnostic efforts and interventions are lifesaving and delays may result with worse prognosis. In addition to the general rules of emergency management, anamnesis, exam...

Fish-eye ampulla refers to a swollen ampulla that extrudes thick mucin visible to the naked eye during ERCP. Although this finding is rare, it is pathognomonic for IPMN [1]. Surgery is recommended in the presence of main pancreatic duct >10 mm, jaundice, or mural nodules due to the high frequency of high-grade dysplasia and invasive carcinoma in ma...

Introduction This study aims to assess the predictive value of indices as systemic immune-inflammation index (SII), neutrophil-lymphocyte ratio (NLR) and monocyte/lymphocyte ratio (MLR) on presence of active CMV infection in UC patient. Methods We retrospectively reviewed colonoscopy reports of UC patients between January 2011 and January 2021. Th...

Helicobacter pylori (H.pylori) is an infectious disease that causes chronic gastritis, atrophy, intestinal metaplasia (IM), dysplasia and eventually intestinal type adenocarcinoma in the stomach. Since these lesions associated with H.pylori are not homogeneously distributed across the stomach; it is recommended to take at least 5 biopsies from cert...

Intestinal tuberculosis is an uncommon form of tuberculosis, and its diagnosis remains a challenge in patients with Crohn's disease. The clinical, endoscopic, radiologic, and histologic features of Crohn's disease and tuberculosis are remarkably similar, posing a diagnostic challenge. Accurate diagnosis of these two conditions remains vital to the...

Small bowel adenocarcinoma (SBA) is a rare disease and presents with intermittent abdominal pain, weight loss, nausea, vomiting, and gastrointestinal bleeding. In cases with delayed diagnosis, intestinal obstruction or bowel perforation can also be observed. In our case, the patient presented with ileus after an operation that was diagnosed with SB...

Purpose: To identify the correlation of nonalcoholic pancreatic steatosis (NAPS) with nonalcoholic fatty liver disease (NAFLD) in an outpatient group. Based on its metabolic and imaging properties, NAPS has been increasingly recognized in recent years; however, its interaction with NAFLD is still not clear. Patients and methods: In this cross-se...

Surgeries for obesity can lead to complications. Dumping syndrome is one such complication caused by the quick passage of hyperosmolar chyme from the stomach to the duodenum. Mild cases can be cured with dietary modification and medical treatment. However, refractory cases may need invasive treatment options, such as transoral outlet reduction or s...

Using endoscopic variceal ligation (EVL) for esophageal varices may increase the risk of developing or worsening the formation of gastroesophageal varices (GOV). Band ligation, cyanoacrylate injection, and endoscopic ultrasound-guided coil and/or glue injection treatments can be used, but these methods have some risks such as bleeding and ulcer dev...

Alpha-fetoprotein (AFP)-producing gastric cancer (AFPGC) is a rare, aggressive tumor. In the absence of metastasis in diagnosis, close observation and long-term follow-up is needed to monitor and slow its progress. We report a young patient who presented with nonbiliary pan-creatitis. Upon finding Virchow's nodule, we conducted tests and observed m...

Human immunodeficiency virus (HIV) is a worldwide disease with an increasing number of cases globally. Initially, HIV cholangiopathy was often observed among such patients but has become rare after three decades because of the availability of new treatment options and potent antiretroviral drugs. Consequently, its occurrence now suggests drug resis...

Hepatosteatosis, a common condition, is increasing in prevalence. It is typically associated with diet, alcohol consumption and obesity. In some cases, a rare genetic disease may be the underlying defect. Lipid storage myopathy (LSM) is a genetic disease caused by lipid metabolism defects. LSM often affects the muscles, heart and liver. Coenzyme Q,...

HIV is a global epidemic that needs a multidisciplinary approach. Gastrointestinal bleeding is uncommon in HIV-positive patients. In cases such as bacillary angiomatosis, Kaposi sarcoma, herpes simplex, histoplasmosis, and cytomegalovirus (CMV) colitis, the underlying reason could be HIV. The reason could also be unrelated to HIV, such as peptic ul...