All gastric ulcers are biopsied, since gross inspection alone cannot determine whether a malignancy is present. Smaller, more sharply demarcated ulcers are more likely to be benign.

• 胃镜小溃疡。所有的胃溃疡都作了活组织检查,因为仅肉眼检查不能决定是否是恶性。小的有明显分界的溃疡很可能是良性的。