Compression of the brachial plexus may be identified by weakness of the muscles in the hand, near the base of the thumb. Compression of the subclavian artery is often diagnosed by finding a positive Adsons sign on examination, where the radial pulse in the arm is lost during abduction and external rotation of the shoulder. A positive Adsons sign is non-specific for the presence of a cervical rib however, as many individuals without a cervical rib will have a positive test. Compression of the sympathetic chain may cause Horners syndrome. Other animals
Many vertebrates, especially reptiles, have cervical ribs as a normal part of their anatomy rather than a pathological condition. Some sauropods had exceptionally long cervical ribs; those of Mamenchisaurus hochuanensis were nearly 4 meters long. In birds, the cervical ribs are small and completely fused to the vertebrae. In mammals, the ventral parts of the transverse processes of the cervical vertebrae are the fused-on cervical ribs. Recent studies have also found a high percent of cervical ribs in woolly mammoths. It is believed that the decline in mammoth numbers may have forced inbreeding within the species which in turn had increased the number of mammoths being born with cervical ribs. Cervical ribs have been connected with leukaemia in human children, so it has given scientists new evidence to believe that the mammoths extinction was attributed to the condition. References


== External links ==
Estradiol/drospirenone (E2/DRSP), sold under the brand name Angeliq, is a combination of estradiol (E2), an estrogen, and drospirenone (DRSP), a progestin, antimineralocorticoid, and antiandrogen, which is used in menopausal hormone therapy, specifically the treatment of menopausal syndrome and osteoporosis, in postmenopausal women. It is taken by mouth and contains 0.5 to 1 mg E2 and 0.25 to 0.5 mg DRSP per tablet. The medication was approved in the United States in 2005. It is marketed widely throughout the world. See also
Estetrol/drospirenone
Ethinylestradiol/drospirenone
Ethinylestradiol/drospirenone/levomefolic acid
Ethinylestradiol/drospirenone/prasterone
List of combined sex-hormonal preparations § Estrogens and progestogens

References
External links
Angeliq (estradiol/drospirenone) FDA Label
Estradiol/drospirenone (Angeliq) - AdisInsight