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<p>Heterotopia refers to the presence of normal cells or tissue located in anatomically unusual sites of the body. In the gastrointestinal tract, most heterotopic lesions do not cause any symptoms, but rarely, they can be mistaken for neoplasms during endoscopic examinations. A&#xa0;45-year-old man presented with lower abdominal pain and blood in the stool. Macroscopically, a&#xa0;polypoid lesion was found and resected by endoscopic submucosal dissection. Histologically, ectopic gastric mucosa, salivary gland-like structures compatible with bronchial glands, and respiratory epithelium were found. This combination of a&#xa0;gastric and respiratory ectopia has so far been rarely documented in the literature.</p>

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Eine Malignität vorspiegelnde kombinierte gastrale und respiratorische Heterotopie im Rektum

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  • 发表日期：

    2025年10月9日

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  • Nina Siegl,
  • Rupert Langer,
  • Alexander Ziachehabi,
  • Petar Noack

摘要

Heterotopia refers to the presence of normal cells or tissue located in anatomically unusual sites of the body. In the gastrointestinal tract, most heterotopic lesions do not cause any symptoms, but rarely, they can be mistaken for neoplasms during endoscopic examinations. A 45-year-old man presented with lower abdominal pain and blood in the stool. Macroscopically, a polypoid lesion was found and resected by endoscopic submucosal dissection. Histologically, ectopic gastric mucosa, salivary gland-like structures compatible with bronchial glands, and respiratory epithelium were found. This combination of a gastric and respiratory ectopia has so far been rarely documented in the literature.