Background
The prevalence of ectopic gastric mucosa (EGM) is approximately 11–14.2%. Most EGMs are clinically insignificant;however, they are occasionally known to harbor esophageal cancer.
Case
Case 1 was a 64-year-old man diagnosed with esophageal cancer in the EGM, UtCe Type0-IIa tub1 cT1b-SM1 (N0M0) cStageI. We performed endoscopic submucosal dissection (ESD) for diagnostic and therapeutic purposes. Pathological examination revealed a well-differentiated adenocarcinoma arising from the EGM.
Case 2 was a 47-year-old man diagnosed with CeUt Type0-IIa SCC cT1-MM (N0M0) cStageI. His lesion was sandwiched between two EGMs. It was thought that the lesion might have extended to the EGM. We performed ESD on one of the EGMs to confirm this hypothesis. Pathological examination revealed a squamous cell carcinoma. No lesion was found in the EGM;however, the tumor was present on the borderline of the EGM.
Conclusion
We report two cases of esophageal cancer arising from or within EGM treated using ESD. The patients recovered after ESD and did not require further treatment.
