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. Author manuscript; available in PMC: 2021 Apr 20.
Published in final edited form as: Thorac Surg Clin. 2021 Feb;31(1):1–10. doi: 10.1016/j.thorsurg.2020.09.007

Fig. 7.

Fig. 7.

The cervical rib may be complete, in which it is frequently fused to the first thoracic rib (A), or it may be incomplete with a fibrous band to the first thoracic rib (B). The elongated transverse process of C7 may function similarly to an incomplete cervical rib, but is anatomically distinct from a rib in its continuity with the C7 vertebra (C). ([A] From Makhoul RG, Machleder HI. Developmental anomalies at the thoracic outlet. J Vasc Surg. 1992;16:538; with permission; and [B] From Makhoul RG, Machleder HI. Developmental anomalies at the thoracic outlet. J Vasc Surg. 1992;16:538; with permission; and [C] Courtesy of Dave Klemm, Georgetown University School of Medicine.)