Most of the wrist pain following injuries are actually related to injuries to ligament rather than fractures. So most of them may not be revealed on conventional plain x ray. Careful history taking about mechanism of injury and physical examination is he clue to diagnosis and interpretation of MRI need to correlated with physical signs. Without proper diagnosis and treatment the ligament injury may become chronic and develop symptoms caused by carpal instability. The two most common instabilities: scapholunate and distal radioulnar joint instability will be discussed in the lecture.