Table 1

- Patient’s timeline.

Dates	Patient’s information
June 2, 2021	A 59-year-old female patient presented with abdominal discomfort with acid regurgitation. She was in good health and had no history of external injury or surgeries.
	Summaries from initial and follow-up visits	Diagnostic testing (including dates)	Interventions
May 31, 2021	- Pyloric obstruction and thickening of the gastric wall in the gastric antrum. - Mucosal congestion, swelling in the anterior pyloric area, and pyloric canal stenosis.	A computed tomography (CT) enhanced scan of the entire abdomen and pelvis Gastroscopy	/
June 9, 2021	- Deviation of 10 cm towards the lesser curvature and an extension of 22 cm towards the greater curvature. - A 5.5 x 5.4 cm round-like mass was found during surgery.	/	Gastrointestinal surgery
June 18, 2021	Gastric and pancreatic heterotopic tissue (type III) with adenocarcinoma with epithelial carcinogenesis.	- Histology examination - Immunohistology examination
July 30, 2021			6 rounds of chemotherapy and antibiotics (gemcitabine and tigecycline)
June 20, 2022	- One year after the surgical treatment of pancreatic cancer originating from the ectopic pancreas in the lesser curvature of the gastric antrum, irregular and slightly lower-density tumor recurrence was observed in the surgical area. - Multiple scattered metastatic soft tissue masses of varying sizes were present in the abdominal cavity, mainly concentrated in the Douglas cul-de-sac (rectouterine pouch) in the pelvic floor.	- The second contrast-enhanced axial CT scan of the upper abdomen and pelvic regions - The contrast-enhanced sagittal CT scan of the abdominal and pelvic regions