Suntrea T G Hammer1, Joel K Greenson. 1. Department of Pathology, University of Michigan Health System, Ann Arbor, 48109, USA. sgoudeau@med.umich.edu
Abstract
CONTEXT: The finding of increased intraepithelial lymphocytes with normal villous architecture (Marsh I lesion) is seen in up to 3% of duodenal biopsies. The differential diagnosis includes a wide range of possibilities, including celiac disease, bacterial overgrowth, nonsteroidal antiinflammatory drug damage, reaction to Helicobacter pylori infection, tropical sprue, and chronic inflammatory bowel disease. OBJECTIVES: To highlight the histologic features of the Marsh I lesion, review the diseases and conditions associated with that finding, and to provide pathologists with a rationale and a template for how to identify and report such cases. DATA SOURCES: A review of the literature regarding the histologic features and clinical associations of Marsh I lesions. CONCLUSIONS: Marsh I lesions are a nonspecific finding associated with a number of disease conditions. Historically, between 9% and 40% of cases have been shown to represent celiac disease. Current data do not suggest histologic features to differentiate between diseases associated with this histologic change.
CONTEXT: The finding of increased intraepithelial lymphocytes with normal villous architecture (Marsh I lesion) is seen in up to 3% of duodenal biopsies. The differential diagnosis includes a wide range of possibilities, including celiac disease, bacterial overgrowth, nonsteroidal antiinflammatory drug damage, reaction to Helicobacter pyloriinfection, tropical sprue, and chronic inflammatory bowel disease. OBJECTIVES: To highlight the histologic features of the Marsh I lesion, review the diseases and conditions associated with that finding, and to provide pathologists with a rationale and a template for how to identify and report such cases. DATA SOURCES: A review of the literature regarding the histologic features and clinical associations of Marsh I lesions. CONCLUSIONS: Marsh I lesions are a nonspecific finding associated with a number of disease conditions. Historically, between 9% and 40% of cases have been shown to represent celiac disease. Current data do not suggest histologic features to differentiate between diseases associated with this histologic change.
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