Mucosa-Associated Lymphoid Tissue Lymphoma of the Stomach Associated with a Helicobacter heilmannii sensu stricto Infection One Year After the Successful Eradication of Helicobacter pylori

Daisuke Fujihara; Masayuki Kurimoto; Ikue Sekai; Yasuo Otsuka; Yasuhiro Masuta; Sho Masaki; Hajime Honjo; Takaaki Chikugo; Tomohiro Watanabe; Masatoshi Kudo

doi:10.2169/internalmedicine.6020-25

January 1, 2025Internal MedicineOpen Access

Mucosa-Associated Lymphoid Tissue Lymphoma of the Stomach Associated with a Helicobacter heilmannii sensu stricto Infection One Year After the Successful Eradication of Helicobacter pylori

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Key Points

MALT lymphoma was diagnosed one year post-eradication of H. pylori, indicating a potential link to H. heilmannii.
The gastric infection resulted in significant pathology in the patient, especially as a dog lover with close pet contact.
Observational analysis of gastric infections suggests that non-Helicobacter pylori species may cause similar disorders.
Findings emphasize the need to consider NHPH infections in individuals closely associated with pets to prevent MALT lymphoma.

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Implication

Case report reveals MALT lymphoma associated with helicobacter heilmannii in a dog lover, highlighting the role of nontypeable helicobacter in gastric disorders.

Abstract

Gastric infection by non-Helicobacter pylori Helicobacter (NHPH) species causes gastric disorders, including mucosa-associated lymphoid tissue (MALT) lymphoma. We herein report a dog lover with MALT lymphoma associated with a H. heilmannii sensu stricto infection. H. heilmannii s.s.-associated MALT lymphoma was detected one year after the eradication of H. pylori against lymphoid aggregates. Given that NHPH species colonize the stomachs of cats and dogs, gastric colonization by H. heilmannii s.s. might be involved in the development of MALT lymphoma in this dog lover. Therefore, it is crucial to consider the possibility of gastric infection with NHPH species in cat or dog lovers.

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Fujihara et al. (2025) studied this question.

synapsesocial.com/papers/68e0fccf05487b79b21c04ee https://doi.org/10.2169/internalmedicine.6020-25

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Mucosa-Associated Lymphoid Tissue Lymphoma of the Stomach Associated with a Helicobacter heilmannii sensu stricto Infection One Year After the Successful Eradication of Helicobacter pylori

Key Points

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Abstract

Discussion

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Mucosa-Associated Lymphoid Tissue Lymphoma of the Stomach Associated with a Helicobacter heilmannii sensu stricto Infection One Year After the Successful Eradication of Helicobacter pylori

Key Points

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Implication

Abstract

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