Triquetral

Looks like

A pyramid-shaped wrist bone on the little-finger side of the near row, under the pisiform.

What it does

Links the ulnar side of the wrist and anchors ligaments that stabilise it.

Keeping it well

The second most commonly broken carpal bone, usually a small chip on its back after a fall; tends to heal with a splint.

Related conditions

• Acromegaly
• Carpal tunnel syndrome
• De Quervain's tenosynovitis
• Dupuytren's contracture & trigger finger
• Fractures
• Fragility fracture
• Frailty & falls in older age
• Ganglion cyst
• Hyperparathyroidism
• Juvenile idiopathic arthritis
• Osteogenesis imperfecta (brittle bone disease)
• Osteomalacia & rickets
• Osteomyelitis (bone infection)
• Osteoporosis
• Paget's disease of bone
• Pseudogout (calcium pyrophosphate disease)
• Raynaud's phenomenon
• Repetitive strain & overuse injury
• Rheumatoid arthritis
• Sarcoma
• Vitamin B1, C and other deficiencies
• Vitamin D deficiency