Neck Lymph Node Boundary Sublevel VB

**Semantic type:** Finding

**Definition:** The following anatomical structures define the neck lymph node boundary for sublevel VB: Superior: horizontal plane defined by the lower border of the cricoid cartilage; inferior: clavicle; anterior (medial): posterior border of the sternocleidomastoid muscle; posterior (lateral): anterior border of the trapezius muscle. (AJCC 8th ed.)