• Internal medicine · Feb 2025

    Rapid Development of a Hemorrhagic Hyperplastic Polyp in a Patient with Evolving Autoimmune Gastritis after Helicobacter pylori Eradication.

    • Tohru Kotera, Takahiro Takemoto, Ryoji Kushima, and Ken Haruma.
    • Department of Medical Examination, Uji-Tokushukai Medical Center, Japan.
    • Intern. Med. 2025 Feb 8.

    AbstractIn 2020, a 56-year-old woman with a history of Helicobacter pylori (H. pylori) eradication 9 years previously presented with a hemorrhagic hyperplastic polyp. Endoscopic and histological findings led to the diagnosis of advanced-stage autoimmune gastritis (AIG). A review of endoscopic findings from 2014 was available, and narrow-band imaging showed swelling of the gastric areas, characteristic of early-stage AIG. Together with the rapid growth of a hyperplastic polyp, these findings suggest a case of AIG that rapidly exacerbated after eradication. To our knowledge, this is the first case report of a rapidly developing hemorrhagic hyperplastic polyp associated with AIG after H. pylori eradication.

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