Hand Trauma
A 35-year-old man presents after jamming his finger while catching a ball. He has a flexion deformity at the distal interphalangeal joint and cannot actively extend the DIP. Radiographs show no fracture. Regarding extensor tendon injuries:
Mark each as TRUE or FALSE
Mallet finger results from disruption of the terminal extensor tendon insertion on the distal phalan...
Boutonniere deformity results from disruption of the central slip insertion on the middle phalanx; t...
Extensor tendon zones are numbered 1-8 from distal to proximal; Zone 1 is over the MCP joint; open e...
The extensor mechanism over the fingers includes the extensor digitorum communis, lateral bands (lum...
Swan neck deformity (PIP hyperextension, DIP flexion) can result from untreated mallet finger, volar...
Answer the questions to see explanations
Click T (True) or F (False) for each option