It may be only a matter of time before the “gold standard” small biopsy is no longer considered mandatory to make a diagnosis of celiac disease in adults, according to Joseph A. Murray, MD, consultant in the division of gastroenterology and hepatology and department of immunology, Mayo Clinic, Rochester, Minn.
- by Andrew D. Bowser in Pediatric News 1
“Right now, none of the adult societies support biopsy avoidance, but I predict that it will come to be,” Dr. Murray said at the inaugural Perspectives in Digestive Diseases meeting held by Global Academy for Medical Education.*
- Biopsy, already a tarnished standard because of issues such as interpretation, according to Dr. Murray, is being challenged in studies that examine alternate ways of making the diagnosis.
In one recently reported, investigators at Royal Derby Hospital, England, suggested that clinicians could make a reliable diagnosis of celiac disease by looking at serum IgA-tissue transglutaminase antibody levels.
Those investigators retrospectively analyzed an unselected series of 270 adult patients and found that an IgA-tissue transglutaminase antibody cut-off of 45 U/mL, or 8 times the upper limit of normal, had a positive predictive value of 100%.
Biopsy avoidance remains controversial, however. In a published letter to the editor commenting on the Derby study, authors took issue with some of the statistical analysis and remarked that the study included some patients with Marsh 1 histology.
“Studies suggest that the majority of seropositive patients with Marsh 1 histology do not progress to develop villous atrophy while on a gluten-containing diet, raising the question whether all of them are truly celiac,” they wrote.
The first society to endorse skipping the biopsy was the European Society for Pediatric Gastroenterology, Hepatology, and Nutrition.
Infor the diagnosis of celiac disease, that group said a celiac diagnosis could be made based on symptoms, antibodies, and HLA in children with symptoms suggestive of the disease and high antibody levels (IgA anti-tissue transglutaminase type 2 antibody titers greater than 10 times the upper limit of normal).
- “The data [are] now pretty good to support that approach in symptomatic children,” Dr. Murray said. “If we apply these to adult patients, it’s not bad, actually, partly because our biopsies aren’t perfect.”
However, not all adult gastroenterology specialists agreed with the recommendations of the pediatric society.from the British Society of Gastroenterology have stated that serology cannot replace biopsy, which “remains essential” for celiac disease diagnosis.
* Global Academy and this news organization are owned by the same parent company.
Dr. Murray reported disclosures related to Ardent Mills, DBV Technologies, Evelo, GlaxoSmithKline, Johnson & Johnson, Immunogenix, Innovate, National Center for Complementary and Integrative Health, Takeda, Torax Medical, and UCB.