Hello - thanks for asking your question.
One of the causes of pernicious anemia is chronic gastritis which leads to a decrease in intrinsic factor production. Chronic gastritis is associated with an increased risk of intestinal cancer or gastric carcinoid tumors. This is why the diagnosis of gastritis should be confirmed via upper endoscopy.
An upper endoscopy, although uncomfortable, is a fairly common procedure. Medication is typically given to improve the tolerability of the procedure. I would recommend undergoing the endoscopy.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Thanks,
Kevin, M.D.