请教 消化性溃疡与糜烂的定义和鉴别？

以下是《Robbins Basic pathology 8th edition 》P593上的定义，和《病理学》教科书及《西氏内科学》的定义不太一样。

Ulcers of the alimentary tract are defined histologically as a breach in the mucosa that extends through the muscularis mucosae into the submucosa or deeper. This is to be contrasted to erosions, in which there is a breach in the epithelium of the mucosa only. Erosions may heal within days, whereas healing of ulcers takes much longer. Although ulcers may occur anywhere in the alimentary tract, by far, the most common are the peptic ulcers that occur in the duodenum and stomach. Here we discuss peptic ulcers and acute gastric ulceration

看来是我没有讲清楚，消化性溃疡到底是累及粘膜基层就可诊断，还是必须累及粘膜下层，也是就与糜烂的区别。有的书是以粘膜下层为标准，有的是以粘膜基层为标准。

还请赐教