What is a hypoplastic first rib?
What is a hypoplastic first rib?
First-rib hypoplasia. Abstract. Bilateral first-rib hypoplasia, a skeletal anomaly not previously associated with the nail-patella syndrome, is reported occurring in a young woman possessing numerous other features of this potentially lethal condition.
What is special about the first rib?
The first rib is the widest, shortest and has the sharpest curve of all the ribs. The head only articulates with the body of the T1 vertebra and therefore only one articulatory surface is present. As in the typical ribs, the tubercle has a facet for articulation with the transverse process of vertebrae.
What does it mean to have hypoplastic ribs?
Hypoplastic, or short, ribs are one of the least common of the rib’s structural abnormalities. A rib is considered hypoplastic if its lateral margin is more than 4 mm medial to a tangent drawn between the adjacent ribs’ lateral margins [8].
What muscles attach to the 1st rib?
The first rib has several attachments which are listed below;
- Anterior scalene muscle: scalene tubercle.
- Middle scalene muscle: between groove for the subclavian artery and transverse tubercle.
- Intercostal muscles: from the outer border.
- Subclavius muscle: arises from the distal shaft and first costal cartilage.
Why is the 1st rib atypical?
The first rib is atypical because it is wide and short, has two costal grooves, and one articular facet. The second rib is thin, long, and has a tuberosity on its superior surface for the attachment of the serratus anterior muscle. The eleventh and twelfth ribs have only one articular facet with no neck.
What is hypoplastic symptom?
Symptoms. Hypoplasia typically causes problems with how a tissue or organ functions. The consequences of hypoplasia depend on what area of the body it affects. For example, enamel hypoplasia causes symptoms that include: yellow, brown, or white marks and stains on the teeth.
What are hypoplastic ribs?
Hypoplastic (short) and defective (interruption) ribs are one of the least common structural congenital abnormalities of the ribs. Hypoplasia and aplasia of the rib (11 pairs of ribs) can be observed together with Down Syndrome and Poland Syndrome.
What are congenital rib abnormalities?
Congenital rib abnormalities occur in number ( the normal 12 ribs) or in formation/structural. Malformations can include hypoplastic, bridging, forked, fused and hypoplastic ribs. Even ribs with holes occur because of the segmentation issues.
What are malformations of the ribs?
Malformations can include hypoplastic, bridging, forked, fused and hypoplastic ribs. Even ribs with holes occur because of the segmentation issues. Illustrated examples can be found here. The rib’s cartilage, bone or both can be affected.
What does prominent ossification of the first ribs indicate?
Prominent ossification in the cartilaginous ends of the first ribs ( arrow ). These are easily misconstrued as tumors in the underlying lung. FIG. 8-12. Cervical rib. A: The transverse process of C7 is usually prominent, as seen in this case on the right.
