A unique case of granulomatous gastritis of unknown etiology is reported. The patient, a 43-year-old Haitian woman, suffered a gastric perforation from a disease process limited to the stomach. The stomach was markedly enlarged and edematous with transmural, serpiginous granulomatous tracks throughout the gastric wall, but most numerous in the fundic region. Accompanying acute and chronic inflammatory infiltrates were scant. No microorganisms, parasites, foreign body particles, or other known granulogenic materials could be identified. Clinical and pathologic features also differed markedly from granulomatous gastritis seen in sarcoidosis, Crohn's disease, or isolated granulomatous gastritis as defined by Fahmi et al.10 Infection by a parasite for which man is not the definitive host seems the most likely etiology.
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