AI-powered boutonniere deformity review for central slip injury, PIP extensor mechanism disruption, lateral band position, and chronic finger deformity clues on MRI or ultrasound.
Boutonniere deformity usually begins with injury to the central slip of the extensor tendon over the PIP joint. When the central slip cannot extend the PIP joint, the lateral bands can shift and the finger may develop PIP flexion with DIP hyperextension. X-rays can show avulsion fragments or joint alignment, while MRI or ultrasound can evaluate the extensor mechanism when the diagnosis is uncertain.
Early central slip injuries may look like a simple swollen finger, and the fixed deformity can develop later. X-rays may be normal if there is no avulsion fragment. Persistent inability to extend the PIP joint should be assessed clinically even when the radiograph is subtle.
No. Imaging can show avulsion fragments, alignment, and tendon signal, but tests such as active extension assessment and specialist hand examination remain important for deciding splinting, therapy, or surgery.
A patient-friendly guide to hand and finger X-rays, including alignment, phalanx fractures, metacarpal fractures, arthritis, and avulsion fragments.
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