injuries poisoning
Scaphoid (Navicular) Fractures
Introduction
Scaphoid fractures usually result from wrist hyperextension. They may not be visible on initial x-rays. Complications can be severe. (See also Overview of Fractures .) The scaphoid is the most commonly injured carpal bone. Scaphoid fractures usually result from wrist hyperextension, typically during a fall on an outstretched hand. They can disrupt the blood supply to the proximal scaphoid. Osteonecrosis (ON) is thus a common complication, even when initial care is optimal, and can cause disabling, degenerative arthritis of the wrist. 