Bifid or forked ribs are not uncommon. They are thought to occur in ~0.2% of the population and there may be a female as well as right sided predilection 2.
Usually asymptomatic, they may cause musculoskeletal pain or intercostal nerve entrapment. If of the 1st rib, then may be an uncommon cause of thoracic outlet syndrome.
Bifid ribs can be seen in Gorlin (nevoid basal cell carcinoma) syndrome.
- thoracic skeleton
- muscles of the thorax
- spaces of the thorax
- tracheobronchial tree
bronchopulmonary segmental anatomy
- left lung
- right lung
- variant anatomy
- lung parenchyma
- bronchopulmonary segmental anatomy
- cardiac chambers
- heart valves
- coronary circulation
- innervation of the heart
- blood supply of the thorax
aorta (development | variant anatomy)
- ascending aorta
- aortic arch (variant anatomy | Bovine)
- aoritc isthmus
- descending aorta
- pulmonary trunk
- aorta (development | variant anatomy)
- innveration of the thorax
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- 1. Cağli K, Ozçakar L, Beyazit M et-al. Thoracic outlet syndrome in an adolescent with bilateral bifid ribs. Clin Anat. 2006;19 (6): 558-60. doi:10.1002/ca.20280 - Pubmed citation
- 2. Kurihara Y, Yakushiji YK, Matsumoto J et-al. The ribs: anatomic and radiologic considerations. Radiographics. 19 (1): 105-19. Radiographics (full text) - Pubmed citation
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