منابع مشابه
The occult blood test.
The original occult blood tests were designed for forensic purposes, Schonbein and van Deen using a chemical test with guaiacum which was more sensitive than the older Teichmann's haemin crystal test. Subsequently similar chemical methods were widely used and in I893 Weber described his version of the guaiacum test for detecting occult blood in the faeces. Boas first made extensive use of this ...
متن کاملDigital rectal examination versus spontaneous passage of stool for fecal occult blood testing.
BACKGROUND The diagnostic value of a positive fecal occult blood test (FOBT) at the time of digital rectal examination (DRE) is disputed despite being used commonly by a significant number of physicians. A meta-analysis was conducted to evaluate FOBT by DRE for detecting neoplasia versus FOBT on stool passed spontaneously (SPS) in asymptomatic patients undergoing colorectal cancer screening. ...
متن کاملFalse Negative Fecal Occult Blood Test: Prozone Effect
Dear editor, the fecal occult blood test is the presently widely used screening laboratory test for colorectal cancer. At present, the test is usually based on an immunological diagnostic principle (1, 2). A false positive fecal occult blood is common and widely mentioned in literature. Nevertheless, the false negative is little mentioned in the paper. Here, the authors discuss the issue of the...
متن کاملOccult Hepatitis B Infection and Its Role in Blood Safety: a Review
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 ...
متن کاملPerianal verrucous epidermal naevus mimicking perianal warts.
CASE REPORT A 2 year old boy was referred by a paediatrician for the evaluation of a perianal verrucous lesion which looked like perianal warts. The condition was first noticed by the child’s mother when he was 9 months old as a raised velvety area around the anal orifice. Over the next few months, multiple, small, warty elevations developed over the region. The lesions had remained stable ther...
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ژورنال
عنوان ژورنال: Journal of Pediatric Gastroenterology & Nutrition
سال: 2015
ISSN: 0277-2116
DOI: 10.1097/mpg.0000000000000754