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The Bone & Joint Journal

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The Journal of Bone & Joint Surgery British Volume
Vol. 57-B, Issue 1 | Pages 24 - 29
1 Feb 1975
Lloyd-Roberts GC Graham Apley A Owen R

The cause of pseudarthrosis of the clavicle is obscure. Right-sidedness is an almost constant feature. We have proposed that the lesion is sometimes due to pressure upon the developing clavicle by the subclavian artery which is normally at a higher level on the right side. This may be accentuated in the presence of cervical ribs or unduly elevated first ribs, both of which we have observed in association with pseudarthrosis. We have also noted pseudarthrosis on the left side in association with dextrocardia (when the relative positions of the subclavian arteries are reversed) and in the presence of a large left cervical rib.

We have speculated upon the nature of the clavicular defect in cranio-cleido dysostosis, in which disorder the first ribs are habitually elevated. A similar mechanism may be involved.


The Journal of Bone & Joint Surgery British Volume
Vol. 56-B, Issue 3 | Pages 598 - 598
1 Aug 1974
Graham Apley A