RATIONALE: Gastric carcinoma of fundic gland type is a new type of gastric cancer with a low incidence rate. The mechanism of gastric carcinoma of the fundic gland differs significantly from that of common adenocarcinoma. While it typically presents as a benign growth, there are cases where it can progress to malignancy. If early endoscopy fails to provide an accurate diagnosis and the treatment is inappropriate, the tumor may metastasize and spread. PATIENT CONCERNS: A 61-year-old male, abdominal discomfort, was performed gastroscopy. DIAGNOSES: Gastroscopy revealed a raised lesion approximately 1.8 cm × 1.5 cm in size in the middle of the gastric body, with surface flushing. INTERVENTIONS: The patient was performed endoscopic submucosal dissection. OUTCOMES: The pathology showed gastric carcinoma of fundic gland type SM2, and the cure grade was eCura B. Follow-up review was conducted after communicating with the patient. After 6 months of follow-up, the patient shows no signs of recurrence or metastasis
future observations will require ongoing monitoring. This case emphasizes the difficulties of endoscopic diagnosis, and postoperative pathology confirmed the diagnosis of gastric carcinoma of the fundic gland type. LESSONS: Gastric carcinoma of the fundic gland type is characterized by low atypia and easy SM invasion. This case highlights the importance of using endoscopy to identify this type, and select appropriate treatment methods. Because the infiltrative characteristics differ from those of conventional early gastric cancer, selecting endoscopic submucosal dissection treatment for lesions smaller than 2 cm can reduce postoperative tumor recurrence and metastasis.