Swelling and bruising may also occur on the palmar side of the wrist. A key symptom of scaphoid fracture is tenderness over the scaphoid bone at the base of the thumb, which may be felt on the back or the palmar side of the hand. ![]() Symptoms include pain, difficulty with wrist movement and grip weakness. Scaphoid fractures are often mistaken for wrist sprains because they have similar symptoms. Other common causes for scaphoid fracture include automobile, motorcycle or biking accidents and forceful blows to the wrist. This position puts tremendous force at the scaphoid, and can cause it to bruise, crack, or break into two or more pieces. The most common cause of a scaphoid fracture is a fall onto an outstretched hand, which causes the wrist to hyperextend and rotate toward the thumb. The scaphoid spans between both rows of carpals, coordinating motion between the radius and the carpal bones. The carpal bones are arranged in two rows between the radius, ulna, and the metacarpals. ![]() The wrist is made up of eight carpal bones and the ends of the radius and ulna. An improperly treated scaphoid fracture can result in significant wrist pain, arthritis, and loss of motion. The scaphoid, one of the most important bones in the wrist, has a limited blood supply. A scaphoid fracture, one of the most common types of wrist fractures, is a break in the scaphoid bone.
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