Overview

AP and lateral thumb radiographs evaluate the first metacarpal and phalanges for fractures and dislocations. The thumb is positioned separately from the hand to avoid overlap. These views are standard for thumb trauma and degenerative assessment.

Technique

Obtain AP view with the thumb extended and the lateral view with the thumb in true lateral. Use tight collimation and a small focal spot for optimal detail. Immobilize the thumb to reduce motion.

Clinical Indications

Thumb series are indicated for trauma pain and suspected Bennett or Rolando fractures. They assess joint congruity and articular surface involvement. CT is used for complex intra articular fractures.

Image Assessment

Evaluate cortical continuity base of first metacarpal and articular surface for displacement. Assess for subluxation and associated soft tissue injury. Report findings relevant to hand surgery referral.