Table 1 : Regional Nodal Contours: Anatomical Boundaries according to RTOG.

	Cranial	Caudal	Anterior	Posterior	Lateral	Medial
SCV	Caudal to the cricoid cartilage	Junction of brachioceph.- axillary viens./ caudal edge of clavicle head	Sternocleido-mastoid (SCM) muscle (m.)	Anterior aspect of the scalene m.	Cranial: lateral edge of SCM m. Caudal: junction 1st rib-clavicle	Excludes thyroid and trachea
ICV	Pec. Minor m. insert on cricoid	Axillary vessels cross medial edge of Pec. Minor m.	Posterior surface Pec. Major m.	Ribs and intercostal muscles	Medial border of Pec. Minor m.	Thoracic inlet

SCV: supraclavicular fossa;
ICV: infraclavicular fossa.