Os acetabuli and mixed-type FAI. This 79yo male with a history of right hip pain for 1 month has features of both pincer and cam-type FAI. Femoral head asphericity (yellow arrow), irregular anterosuperior bump (green arrowheads), os acetabuli (yellow arrowhead) and hypertrophic acetabular rim (blue arrow).
1 The other 22 pairs are autosomes (non-sex chromosomes) and look the same for both males and females. 2  The DNA making up each of our chromosomes contains thousands of genes. 3  At the ends of each of our chromosomes are sections of DNA called telomeres.
Each chromosome has a constriction point called the centromere, which divides the chromosome into two sections, or âarms.â The short arm of the chromosome is labeled the âp arm.â The long arm of the chromosome is labeled the âq arm.â The location of the centromere on each chromosome gives the chromosome its characteristic shape, and can be used to ...