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How many duodenal biopsy specimens are required to make a diagnosis of celiac disease?
Wilson P Pais1, Donald R Duerksen, Norman M Pettigrew
1Department of Internal Medicine, University of Manitoba, Winnipeg, Manitoba, Canada.
Insights
Diagnosing celiac disease (CD) requires careful consideration of biopsy numbers. Two duodenal biopsy specimens confirm CD in 90% of cases, while four ensure 100% diagnostic confidence.
Area of Science:
- Gastroenterology
- Pathology
- Clinical Medicine
Background:
- The optimal number of endoscopic biopsy specimens for diagnosing celiac disease (CD) remains unclear.
- Accurate diagnosis of CD is crucial for patient management and preventing long-term complications.
Purpose of the Study:
- To determine the minimum number of duodenal biopsy specimens required for the reliable diagnosis of celiac disease.
- To establish evidence-based guidelines for endoscopic biopsy in CD diagnosis.
Main Methods:
- Retrospective audit of medical records, including histology slide analysis and chart review.
- Inclusion of adult patients undergoing esophagogastroduodenoscopy (EGD) for celiac disease diagnosis.
- Systematic search of pathology databases for specific diagnostic keywords and modified Marsh classification grading.
Main Results:
- Out of 247 cases, 102 patients received biopsy-confirmed celiac disease.
- A diagnosis of CD was confirmed with two biopsy specimens in 90% of cases (84 patients).
- Three biopsy specimens increased diagnostic yield to 95% (additional 5 patients), with four specimens required for 100% confirmation.
Conclusions:
- Two duodenal biopsy specimens are sufficient for a suspected diagnosis of celiac disease in all cases and a confirmed diagnosis in 90%.
- Four duodenal biopsy specimens are recommended to achieve 100% diagnostic confidence for celiac disease.
- This study provides valuable data for optimizing endoscopic biopsy protocols in celiac disease diagnosis.
Background:
It is unknown how many endoscopic biopsy specimens are needed to diagnose celiac disease (CD).
Objective:
To determine the numbers of duodenal biopsy specimens needed to diagnose CD.
Design:
Retrospective medical record audit, histology slide analysis, and chart review.
Setting:
A tertiary-care university hospital.
Patients:
Adults who underwent EGD to diagnose CD.
Interventions:
Our pathology database was searched for the keywords "consistent with celiac disease," "not consistent with celiac disease," "villous atrophy," and "intraepithelial lymphocytes" from January 2001 to May 2006. The number of biopsy specimens was determined and graded for a modified Marsh classification, and charts were reviewed for diagnosis verification. CD was confirmed if Marsh grade 3A was found, even on one biopsy specimen.
Main Outcome Measurements:
The number of biopsy specimens needed to make the diagnosis of CD.
Results:
Of 247 cases, 102 patients were diagnosed with biopsy specimen-confirmed CD. In 9 patients, CD could not be confirmed on the basis of histology alone (highest Marsh lesion was grade 1 or 2), but a clinical diagnosis was made on the basis of presentation and serology. CD could be confirmed if only 2 biopsy specimens were obtained in 84 patients (90%), if only 3 biopsy specimens were obtained in an additional 5 patients (95%), and if at least 4 biopsy specimens were taken in the remainder. CD was ruled out in 145 patients. In 142 patients, biopsy specimens were uniformly negative; 3 patients had Marsh grade 1 lesions but negative serology.
Limitations:
A retrospective design.
Conclusions:
Only 2 biopsy specimens will lead to a confirmed diagnosis of CD in 90%, and a suspected diagnosis in all. For 100% confidence in diagnosis of CD, 4 duodenal biopsy specimens should be taken.
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