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Pectus excavatum is a structural deformity of the anterior thoracic wall in which the sternum and rib cage are shaped abnormally. This produces a caved-in or sunken appearance of the chest. It can either be present at birth or develop after puberty.
MRI of shoulder after dislocation with Hill–Sachs lesion and labral Bankart's lesion Hill–Sachs lesion post-shoulder dislocation X-ray at left shows anterior dislocation in a young man after trying to get up from his bed.
Multiple deformities can arise, namely coronal plane deformities around the knees, ankles, shoulders, elbows, and wrists. For example, genu valgum (knock knees), ankle valgus, ulnar bowing and shortening, and radial head subluxation are encountered. The majority of affected individuals have clinically manifest osteochondromas around the knee.
Evidence for ankylosis found in the fossil record is studied by paleopathologists, specialists in ancient disease and injury.Ankylosis has been reported in dinosaur fossils from several species, including Allosaurus fragilis, Becklespinax altispinax, Poekilopleuron bucklandii, and Tyrannosaurus rex (including the Stan specimen).
"Z-thumb" or "Z-deformity" consists of hyperextension of the interphalangeal joint, fixed flexion and subluxation of the metacarpophalangeal joint and gives a "Z" appearance to the thumb. [16]: 1098 The hammer toe deformity may be seen. In the worst case, joints are known as arthritis mutilans due to the mutilating nature of the deformities. [20]
Juvenile idiopathic arthritis (JIA), formerly known as juvenile rheumatoid arthritis (JRA), [1] is the most common chronic rheumatic disease of childhood, affecting approximately 3.8 to 400 out of 100,000 children. [3]
Another form of secondary scoliosis is degenerative scoliosis, also known as de novo scoliosis, which develops later in life secondary to degenerative (may or may not be associated with aging) changes. This is a type of deformity that starts and progresses because of the collapse of the vertebral column in an asymmetrical manner.
Flat feet, also called pes planus or fallen arches, is a postural deformity in which the arches of the foot collapse, with the entire sole of the foot coming into complete or near-complete contact with the ground. Sometimes children are born with flat feet (congenital).