About 38% of 400 patients with undiagnosed celiac disease had one or more indicators for testing, but only 4.4% received testing, according to a study in the journal Alimentary Pharmacology and Therapeutics. “Gastroenterologists should think about celiac disease more broadly — not just as a gastrointestinal condition but also as a systemic disorder with multiple clinical presentations,” said researcher Dr. Alberto Rubio-Tapia of the Mayo Clinic.