Bifid rib

Bifid or forked ribs are 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.

Clinical presentation

Usually asymptomatic, they may cause musculoskeletal pain or intercostal nerve entrapment. If of the first rib, then they may be an uncommon cause of thoracic outlet syndrome.

Pathology

Associations

Bifid ribs can be seen in Gorlin (nevoid basal cell carcinoma) syndrome.


Thoracic anatomy
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Article Information:

rID: 990
System: Musculoskeletal
Section: Anatomy
Tags: refs, variant
Synonyms or Alternate Spellings:
  • Forked rib
  • Bifid ribs
  • Forked ribs
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    Case 1: left 6th bifid rib
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    Case 2: left 4th anterior bifid rib
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    Case 3: ultrasound - bifid right 3rd rib
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    Case 4: right 5th bifid rib
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    Case 5
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    Case 6
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