Cervical rib

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Cervical rib Classification and external resources
ICD-10	Q76.5
ICD-9	756.2
OMIM	117900
DiseasesDB	2317

A cervical rib is a supernumerary (extra) rib which arises from the seventh cervical vertebra. It is a congenital abnormality located above the normal first rib. A cervical rib is present in only about 1 in 200 (0.5%) of people; in even rarer cases, an individual may have not one but two cervical ribs. The presence of a cervical rib can cause a form of thoracic outlet syndrome due to compression of the brachial plexus or subclavian artery. Compression of the brachial plexus may be identified by weakness of the muscles around the muscles in the hand, near the base of the thumb. Compression of the subclavian artery is often diagnosed by finding a positive Adson's sign on examination, where the radial pulse in the arm is lost during abduction and external rotation of the shoulder.

Anatomy Diagrams

Detailed diagrams of a cervical rib

v • d • e Congenital malformations and deformations of musculoskeletal system (Q65-Q79, 754-756)
Limbs	hip: Dislocation of hip/Hip dysplasia - Upington disease feet (Club foot, Flat feet, Pes cavus) systemic dislocations Larsen syndrome head, face, spine and chest: skull, face and jaw (Dolichocephaly, Greig cephalopolysyndactyly syndrome, Plagiocephaly) - spine Scoliosis - chest (Pectus excavatum, Pectus carinatum) any combination head, face, jaw, upper limb, lower limb, pelvis, dactyly Antley-Bixler syndrome - Schmitt Gillenwater Kelly syndrome dactyly Polydactyly/Syndactyly (Webbed toes) - Cenani Lenz syndactylism reduction deficits (Acheiropodia, Amelia, Ectrodactyly, Phocomelia) upper limb (Cleidocranial dysostosis, Madelung's deformity, Sprengel's deformity, Wallis Zieff Goldblatt syndrome) knee (Genu valgum, Genu varum) other Arthrogryposis
Skull and facial bones	Carpenter syndrome - Craniodiaphyseal dysplasia - Craniosynostosis (Scaphocephaly) - Crouzon syndrome - Hypertelorism - Macrocephaly - Oxycephaly - Platybasia - Saethre-Chotzen syndrome - Treacher Collins syndrome - Trigonocephaly
Spine and bony thorax	Klippel-Feil syndrome - Spondylolisthesis - Cervical rib - Bifid rib
Osteochondrodysplasia	developement of cartilage, tubular bones and spine: Achondrogenesis/Hypochondrogenesis - Boomerang dysplasia - Thanatophoric dysplasia - Short rib-polydactyly syndrome - Chondrodysplasia punctata (Rhizomelic chondrodysplasia punctata, Conradi-Hünermann syndrome), Achondroplasia (Hypochondroplasia, Osteosclerosis congenita) - Ellis-van Creveld syndrome - Otospondylomegaepiphyseal dysplasia - Spondyloepiphyseal dysplasia congenita - Osteogenesis imperfecta - McCune-Albright syndrome - Osteopetrosis - Metaphyseal dysplasia - Recessive multiple epiphyseal dysplasia - Hereditary multiple exostoses - Osteopoikilosis - Chondrodystrophy - Osteodystrophy - Atelosteogenesis, type II - Diastrophic dysplasia
Other	abdominal wall (Congenital diaphragmatic hernia, Omphalocele, Gastroschisis, Prune belly syndrome) - Ehlers-Danlos syndrome
See also non-congenital conditions (M, 710-739)