Rib 1 (right) — true rib

Function

Right partner of the thoracic inlet's roof — flat, broad and horizontal, sharing the subclavian grooves that guide the artery and vein into the axilla.

Landmarks

• Scalene tubercle
• Subclavian artery groove
• Subclavian vein groove

Articulations (joints)

• T1 vertebral body
• Manubrium via first costal cartilage

Clinical relevance

Right first-rib fractures carry the same warning as left: suspect apical lung injury and subclavian trauma in any patient with this fracture.