Focus Issue: Neck Dissection for Oropharyngeal Squamous Cell Carcinoma

Table 3

Neck dissection definitions based on lymphatic and nonlymphatic structures resected.

Neck dissection definition	Nonlymphatic structure			Lymphatic nodal level						Additional*
	SAN	IJV	SCM	I	II	III	IV	V	VI
Radical	x	x	x	x	x	x	x	x
MRND	±	±	±	x	x	x	x	x
MRND Type I		x	x	x	x	x	x	x
MRND Type II			x	x	x	x	x	x
MRND Type III				x	x	x	x	x
Complete				x	x	x	x	x
Selective				±	±	±	±	±
Supraomohyoid				x	x	x
Lateral				x	x	x	x
Posterolateral					x	x	x	x
Anterior/central									x
Extended	±	±	±	±	±	±	±	±	±	x

SAN: spinal accessory nerve; IJV: internal jugular vein; SCM: sternocleidomastoid muscle; I–VI: nodal levels I–VI; MRND: modified radical neck dissection.
*Additional: removal of an additional lymph node level/group or nonlymphatic structure not included in a RND. See text for examples.