Anatom3DPisiform
Os pisiforme · Kost hrášková
Skeleton
Looks like
A pea-sized bone on the palm side of the little-finger edge of the wrist, which you can feel at the heel of the hand.
What it does
A sesamoid in the tendon of the flexor carpi ulnaris, giving the muscle leverage; landmark for the ulnar nerve beside it.
Keeping it well
Falls on the heel of the hand can fracture it; the ulnar nerve and artery pass beside it (Guyon canal), so numbness in the little finger matters.
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