A bifid rib is a congenital abnormality of the rib cage and associated muscles and nerves which occurs in about 1.2% of humans.

[2] Bifid ribs are usually asymptomatic, and are often discovered incidentally by chest X-ray.

Effects of this neuroskeletal anomaly can include respiratory difficulties, neurological difficulties, limitations, and limited energy from the stress of needing to compensate for the neurophysiological difficulties.

[3] Another association is with odontogenic keratocysts of the jaw, which may behave aggressively and have a high propensity to recur when treated with simple enucleation and curettage.

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