The risk of metastasis to lymph nodes is better defined by dividing the mucosa m and the submucosa sm into three sections each: m1 epithelium, m2 lamina propria, m3 muscularis mucosa and SM1 upper third, SM2 middle third and SM3 lower third.
El riesgo de MNL se define mejor dividiendo la mucosa m y la submucosa sm en 3 secciones cada una: m1 epitelio, m2 lámina propia, m3 muscularis mucosa y sm1 tercio superior, sm2 tercio medio y sm3 tercio inferior.