Medically the review by Elaine K. Luo, M.D., specialty in internal medicine — written by Corey Whelan ~ above September 23, 2019

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There’s a generally held falsehood that men have actually one less rib 보다 women. This legend may have actually its roots in the Bible and also the creation story about Eve gift made from one of Adam’s ribs.

This legend is exactly that: one unproven, not correct belief. The no longer held as fact by spiritual leaders of any type of denomination.

The vast bulk of people are born v 12 bag of ribs, because that a total of 24, no matter their sex.

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The exemption to this anatomy dominion are civilization born with particular genetic anomalies. These deserve to take the type of too countless ribs (supernumerary ribs) or too couple of (agenesis that ribs).

Cervical rib

Cervical rib is a hereditary mutation which causes some human being to it is in born through one or two extra ribs in between the base of the neck and the collarbone.

People born v this condition may have one extra rib on either side, or one extra rib ~ above both sides. This ribs might be totally formed bones, or they might be organization fiber strands the don’t contain any kind of bone.

Cervical rib is a problem that can influence any sex.

Many civilization who have this problem don’t have any symptoms and also are unaware that they have actually it. Others experience discomfort, such as neck ache or numbness, led to by the cervical rib pressing down ~ above nerve endings or blood vessels.

Cervical rib may result in a problem called thoracic outlet syndrome (TOS). TOS typically shows up in adulthood and may affect more men than women. No everyone who has cervical rib will build TOS.

Trisomy 21 (Down syndrome)

Down syndrome is a chromosomal disorder. Human being born through Down syndrome sometimes have an extra rib, or a missing 12th rib. Not everyone who has Down syndrome has rib number variations.

Spondylocostal dysplasia

This rare, autosomal recessive disorder is additionally known as spondylocostal dysostosis. It entails an abnormal advance of the ribs and spine. In addition to scoliosis and also fused or misshapen vertebrae, civilization born v this problem may have ribs that are fused together, or absent entirely.

Spondylothoracic dysplasia

Spondylothoracic dysplasia is one autosomal recessive condition. It’s likewise known together spondylothoracic dysostosis. Babies born v this problem have unify ribs and also fused vertebrae. They also have very tiny chest cavities, which can reason severe difficulties with breathing.

Goldenhar syndrome (oculo-auriculo-vertebral spectrum)

Goldenhar syndrome is a rare congenital problem that causes anomalies to occur in the spine, ears, and also eyes.

Babies born v Goldenhar syndrome may have one or two partially created or missing ears, and also benign eye growths. Lock may also have an underdeveloped jaw and also cheekbone, and ribs that space missing, fused, or not totally formed.

Rib abnormalities don’t have to be treated unless they reason problems, such as abnormal development patterns, difficulties with breathing, or pain.

Some rib deformities may be picked up via ultrasound, before your baby is born. Others may become apparent after birth, if her baby has a smaller sized chest size, or displays difficulty with breathing. If so, treatment will focus on respiratory support.

Missing ribs are periodically corrected surgically with a an equipment called a upright expandable prosthetic titanium rib (VEPTR). VEPTRs have the right to be adjusted in size as your boy grows.

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Spinal problems such as scoliosis may be cure surgically or with a brace.

If there are no troubles with posture, breathing, or walking, watchful waiting might be all the is required.

Adults with cervical ribs who begin to endure symptoms associated with TOS may have their extra rib or ribs surgically removed.