Acromion

Looks like

The flat, wide end of the ridge of the shoulder blade, forming the highest point of the shoulder above the joint.

What it does

Roofs the shoulder joint and anchors the deltoid and trapezius; it meets the collarbone at the AC joint.

Keeping it well

The rotator cuff tendons run under it and can be pinched when the arm is raised. A fall onto the shoulder can separate the AC joint — a painful step at the shoulder top.

Related conditions

• Acromegaly
• Fractures
• Fragility fracture
• Frailty & falls in older age
• Frozen shoulder (adhesive capsulitis)
• Hyperparathyroidism
• Osteogenesis imperfecta (brittle bone disease)
• Osteomalacia & rickets
• Osteomyelitis (bone infection)
• Osteoporosis
• Paget's disease of bone
• Polymyalgia rheumatica
• Sarcoma
• Shoulder dislocation
• Vitamin B1, C and other deficiencies
• Vitamin D deficiency