Table 1.

Anatomic borders of CTV for chest wall and regional nodes

Structures	Cranial	Caudal	Anterior	Posterior	Lateral	Medial
Chest wall	Caudal border of the clavicle head	Contralateral inframammary fold	2 mm below the skin surface	Rib-pleural interface	Mid-axillary line	Sternal-rib junction
Supra-clavicular	Caudal to the cricoid cartilage	Junction of brachioecph.- axillary veins/caudal edge clavicle head	Posterior edge of SCM muscle	Anterior aspect of the scalene muscle	Cranial: lateral edge of SCM muscle	Excludes thyroid and trachea
					Caudal: junction 1st rib-clavicle
Infra-clavicular	Pectoralis minor muscle insert on coracoid	Axillary vessels cross medial edge of pectoralis minor muscle	Posterior surface of pectoralis major muscle	Ribs and intercostal muscles	Medial border of pectoralis minor muscle	Thoracic inlet
Internal mammary	Superior aspect of the medial 1st rib.	Cranial aspect of the 4th rib	Encompass the internal mammary vessels	Encompass the internal mammary vessels	Encompass the internal mammary vessels	Encompass the internal mammary vessels

Abbreviations: SCM= sternocleidomastoid.