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Peer-reviewedCC BY 4.0Frontiers in Surgery

Case Report: A rare case of spontaneous lesser omental sac hernia with pneumomediastinum

  • Jianlei Yang1,2
  • Zili Zhang1,2
  1. 1Department of Surgery, The Third Central Hospital of Tianjin, Tianjin, China
  2. 2Tianjin Institute of Hepatobiliary Disease, Tianjin, China
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Abstract

Pneumomediastinum typically results from trauma, iatrogenic injury, or an acute rise in intrathoracic pressure, as occurs with forceful coughing or vomiting. Here, we report an adolescent male patient with a congenital lesser omental defect, which led to small bowel herniation into the lesser sac. The incarcerated intestinal loop compressed the pylorus, resulting in gastric outlet obstruction, intractable vomiting, and subsequent pneumomediastinum. This case illustrates lesser sac herniation leading to vomiting-induced pneumomediastinum via the “Macklin effect”.

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Cite

BibTeXRIS
BibTeX
@article{yang2026case,
  title = {{Case Report: A rare case of spontaneous lesser omental sac hernia with pneumomediastinum}},
  author = {Jianlei Yang and Zili Zhang},
  journal = {Frontiers in Surgery},
  year = {2026},
  month = oct,
  doi = {10.3389/fsurg.2026.1900310},
  url = {https://doi.org/10.3389/fsurg.2026.1900310},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Case Report: A rare case of spontaneous lesser omental sac hernia with pneumomediastinum
AU  - Jianlei Yang
AU  - Zili Zhang
PY  - 2026
DA  - 2026/10/13
JO  - Frontiers in Surgery
DO  - 10.3389/fsurg.2026.1900310
UR  - https://doi.org/10.3389/fsurg.2026.1900310
AB  - Pneumomediastinum typically results from trauma, iatrogenic injury, or an acute rise in intrathoracic pressure, as occurs with forceful coughing or vomiting. Here, we report an adolescent male patient with a congenital lesser omental defect, which led to small bowel herniation into the lesser sac. The incarcerated intestinal loop compressed the pylorus, resulting in gastric outlet obstruction, intractable vomiting, and subsequent pneumomediastinum. This case illustrates lesser sac herniation leading to vomiting-induced pneumomediastinum via the “Macklin effect”.
SN  - 2296-875X
ER  -