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Updated: Jan 31, 2026

Recognition of Epidermal Transglutaminase by IgA and Tissue Transglutaminase 2 Antibodies in a Rare Case of Rhesus Dermatitis
Published on: December 15, 2011
Case of olmesartan-associated enteropathy and transient positive antitissue transglutaminase serology
Jenan Ghaith1, Ismail A Raslan1, Andrew Szilagyi2
1Internal Medicine Residency Program, University of McGill, Montreal, Quebec, Canada.
Abstract:
Olmesartan-associated enteropathy (OAE) is increasingly being recognised as a major differential diagnosis in patients with villous atrophy and negative coeliac disease (CD) serology. OAE and positive coeliac markers have rarely been reported. We report a case of diarrhoea and small bowel villous blunting associated with a transient elevation of antitissue transglutaminase antibody (ATTG). On discontinuation of olmesartan, symptoms improved, repeat biopsies were normal and levels of ATTG also returned normal. We discuss a possible explanation for the transient elevation in ATTG and the significance of considering OAE/CD overlap.
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