: Histopathology, Duodenum, Endoscopic Biopsy

: What This Test Is

: This is a laboratory examination of a small tissue sample (biopsy) collected from the duodenum, the first part of the small intestine just after the stomach. The sample is obtained during an upper endoscopy, a procedure in which a flexible tube with a camera is passed through the mouth to view the upper digestive tract. The tissue is then processed and examined under a microscope by a pathologist.

: Why It Is Ordered

: Doctors order a duodenal biopsy to investigate symptoms such as chronic diarrhea, bloating, weight loss, abdominal pain, or malabsorption. It is commonly used to evaluate for celiac disease, which damages the small-intestine lining, and to look for infections, inflammation, or other structural changes that a visual exam alone cannot detect.

: How the Sample Is Collected

: During the endoscopy, the doctor uses small instruments passed through the scope to gently pinch off one or more tiny pieces of the duodenal lining. The procedure is usually done with sedation or numbing medication to keep you comfortable. The samples are sent to the pathology laboratory for processing and microscopic review.

: What the Results Mean

: The pathology report describes the appearance of the tissue, including the structure of the intestinal villi and the presence of inflammation or other findings. Results are interpreted together with your symptoms, blood tests, and other information. Your care team will explain what any findings mean for you and whether further testing or follow-up is needed.