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Added by Christian Veillette , last edited by Christian Veillette on Sep 06, 2008  (view change)
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Location Wrist
Diagnosis Rotary subluxation
Discussion Multiple images of navicular disorientation with dislocation of the scapholunate joint. The scaphoid bone, seen along it long axis, has a ringed cortex appearance. This cortical ring sign is a sign of scapholunate dislocation, This sign was first described in 1970 in young patient with bilateral dislocation of the carpal naviculars. This sign (also known as the signet-ring sign) is caused by the abnormal orientation of the scaphoid.
Reference Crittenden JJ, Jones DM, Santarelli AG: Bilateral rotational dislocation of the carpal navicular. Radiology 1970, 94:629-630.
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Frequency and characteristics of the scaphoid cortical ring sign
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Christian Veillette 30089 days ago

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