[Scapholunar dissociation--when an accident sequela, when a normal congenital variant?].

The scapholunate dissociation is an instability of the wrist which shows characteristic signs in the X-rays. It is commonly believed to be caused by trauma. During the past two years four cases of idiopathic scapholunate dissociations were identified by the typical radiologic signs on both sides without any trauma or symptoms. Before operative treatment of an injured hand X-rays of the uninjured side should be examined.