background: colorectal cancer is the second cause of the cancer related mortalities in the world. screening can effectively reduce the mortality and morbidity rate of this cancer. sensitivity and specificity of screening methods play an important role in their efficacy. the aim of this study is to review sensitivity and specificity of selected colorectal cancer screening methods systematically....

Isospora belli is an opportunistic protozoon which should be monitored in patients with gastrointestinal complaints such as abdominal pain, nausea and diarrhoea, in both immune-compromised and immune-competent patients. Our case was a 35 year-old male patient who had received a liver transplant because of cirrhosis and hepatic fibrosis. A diarrhoeic stool sample of the patient was sent to the l...

In Japan, Helicobacter pylori eradication has been approved since 2013 for treatment of H pylori-induced chronic gastritis, in an attempt to reduce the prevalence of gastric cancer, a leading cancer in Japan. H pylori infection affects more than 50% of the world's population. H pylori eradication therapy is generally safe. To our knowledge, no case of newly diagnosed ulcerative colitis occurrin...

Colorectal cancer (CRC) is the third most common and fourth cause of cancer-related death in USA. Primary signet ring cell carcinoma (SRCC) colon rectum extremely rare with a reported incidence less than 1%. Here we present case 41-year-old man who presented abdominal pain, severe microcytic anaemia negative faecal occult blood test (FOBT). A CT scan abdomen revealed thickening terminal ileum p...

BACKGROUND/PURPOSE Viral infections are the most common causes of acute infectious diarrhea in the pediatric population. To explore any possible microbial etiologies of acute gastroenteritis in children, we detected stool viral antigen including rotavirus, adenovirus, norovirus and astrovirus. We also studied the possible precipitating factors. METHODS During a period of 1 year (from October ...

A 71-year-old man who had small cell lung cancer was referred to our institution. Before starting chemotherapy, anemia progressed and stool examination was positive for occult blood. An abdominal computed tomography scan with contrast medium enhancement of the gastrointestinal tract disclosed a small intestinal tumor. Histological examination after the surgery confirmed that the tumor was metas...

A 64-year-old woman, chronic smoker presented for a colonoscopy due to symptoms of diarrhoea and weight loss; she has been on loperamide and codeine for symptoms relief. Faecal occult blood (for the National bowel screening program) and subsequent stool cultures were negative. In the ascending colon, cat-scratch mucosal lesions were seen (Figure 1a); furthermore, in the distal transverse colon ...

A 32-year-old man with an unremarkable medical history presented to the ambulatory clinic with complaints of nonlocalized abdominal pain. The results of a physical examination were unremarkable. The results obtained from liver, pancreatic, and renal testing were within the reference intervals, and the results of both a fecal occult blood test and an investigation for parasites in the stool were...

Background: Blood transfusion plays a great role in public health and the blood safety still has remained a main concern. HBV has been considered as one of the most prevalent blood borne infections. It is estimated that chronic HBV affects 350-400 million people worldwide. Comprehensive knowledge about HBV has high importance in Iran due to high number of blood dependent patients. Material ...