Part 1—Upper GI tract
Optimal biopsy sampling will help your expert Inform Diagnostics GI Pathologist to
render a specific and accurate diagnosis. In the gastrointestinal tract,
it is often important to sample normal-appearing as well as abnormal-appearing
mucosa, as many disorders are histologically patchy. In addition, the
endoscopic appearance may not correlate with histologic findings (marked
Helicobacter gastritis may appear endoscopically normal). The outline
below summarizes the biopsies that we recommend taking to allow us to
provide you with the most clinically useful diagnostic information.
Suspected eosinophilic esophagitis: Biopsies of the lower esophagus and middle esophagus (and/or upper esophagus),
submitted in separately labeled jars. Separate samples are needed because
severe reflux in the distal esophagus can appear histologically identical
to eosinophilic esophagitis. Two to four samples should be taken from
each site regardless of the endoscopic appearance since the eosinophilic
infiltrate in this disorder is often patchy.
Barrett’s dysplasia surveillance: Four-quadrant biopsies of every 2 cm of Barrett’s mucosa (every
1 cm if there is a history of high-grade dysplasia). Also, additional
sampling of any endoscopically visible abnormalities (e.g. nodular or
polypoid mucosa) is recommended, and these biopsies should be submitted
separately from the routine surveillance biopsies.
Possible or suspected gastritis: We advocate performing four biopsies, which should include two biopsies
from the antrum (taken 2–3 cm proximal to the pylorus) and two biopsies
from the body. This will allow for optimal detection of H. pylori and,
in most cases, for definitive classification of atrophic gastritis (autoimmune
versus multifocal). These four biopsies should be submitted in two jars
as follows: jar 1 = antrum x2; jar 2 = body x 2. This method is similar
to the updated Sydney protocol, the only difference being that we do not
advocate biopsying the incisura angularis as a recent Inform Diagnostics study
revealed that biopsies of this site yield minimal additional diagnostic
Stomach lesion (e.g. tumor/mass, polyp, or ulcer): Biopsy/excision of the lesion, submitted in its own jar(s), PLUS the
four biopsies described above (submitted in two additional jars). Most
gastric lesions arise in a background of chronic gastric mucosal injury,
and classifying any such process will allow for proper treatment and surveillance
(e.g. intestinal metaplasia) as indicated.
Evaluation for celiac disease: To best evaluate for celiac disease, four biopsies of the duodenum are
recommended, including one from the bulb. We recommend submitting the
bulbar biopsy in a separate jar, as peptic-type injury can disrupt the
histology at this site. However, it is NOT recommended that this site
be “skipped” in a celiac disease workup, as the bulb may be
the site that best demonstrates histologic features of celiac sprue.
Next issue—Lower GI tract
Lash JG, Genta RM. Adherence to the Sydney System guidelines increases
the detection of Helicobacter gastritis and intestinal metaplasia in 400,738
sets of gastric biopsies.
Aliment Pharmacol Therapy 2013;38:424-431.
Lash RH, Taylor SL, and Genta RM. Optimal tissue sampling: the pathologist’s
perspective. In: Weinstein WM, Hawkey CH, and Bosch J, eds.
Textbook of Clinical Gastroenterology and Hepatology. Mosby:Chapter 144;2012.