Normal areas of lucency may be encountered at the anterior ends of the first ribs. Fairly constant in their location, these appear to correspond to deep indentations for the subclavian veins. They may be unilateral or bilateral and should not be confused with a destructive process.
References
Keats TE and Anderson MW. Atlas of Normal Roentgen Variants That May Simulate Disease. 8th edition, page 485; Mosby (2004).
No comments:
Post a Comment
Note: Only a member of this blog may post a comment.