Upper Extremity Anomalies Flashcards
Little oblique lines in osteopenic or osteoporotic bone
Bone bars
Opaque lines that extend across the metaphysis of long bones (parallel to growth plate)
Growth resumption lines (or growth arrest)
Failure of fusion of a portion of the acromion process
Os Acromiale
An “indent” in the inferior border of the clavicle
Rhomboid fossa
A bony spur off the anteromedial aspect of the humerus - towards the joint
Supracondylar process
A short, bowed radius with dorsal dislocation of a long ulna
Madelung’s Deformity
When the ulna is short relative to the radius it is termed _____, if the ulna is long it is termed ______
Negative ulnar variance,
Positive ulnar variance
Negative ulnar variance may predispose the patient to avascular necrosis of the ______
Lunate (Kienbock’s disease)
In positive ulnar variance the patient’s ______ is thin and prone to perforations and tears
Triangular fibrocartilage
Fusion of two or more carpal bones
Carpal coalition
The most common bones involved in carpal coalition are the ___ and ____
Lunate, triquetral
Accessory ossification center at the base of the second metacarpal producing a palpable bony protuberance
Carpal Boss (Os styloideum)
What radiographic view shows a carpal boss?
Lateral wrist
Increased number of fingers or toes
Polydactyly
Fusion of the skin between the fingers or toes. This is the most common developmental anomaly of the hand
Syndactyly
