Pediatric Polydactyly

  • Etiology:
  • Imaging Radiograph:
    — Pre-axial – extra digit(s) towards thumb or hallux
    — Post axial – extra digit(s) towards little finger or toe
    — Central – middle three digits involved
  • DDX:
  • Complications:
  • Treatment: Surgical
  • Clinical: Hyperdactyly with more than 5 digits in hand or foot

Radiology Cases of Polydactyly

Radiology Cases of Post Axial Polydactyly

Radiograph of bilateral post axial polydactaly
AP radiographs of the left hand (left) and right hand (right) show an extra digit arising from each little finger. The extra digit attached to the left little finger appears to have bone within it.

Radiology Cases of Post Axial Polydactyly in Short Rib Polydactyly Syndrome

CXR of short rib polydactaly syndrome
CXR AP (left) and lateral (center) show extremely short ribs resulting in a very small thorax and thus low lung volumes. AP radiograph of the upper extremity (right) shows a short humerus and an extra digit attached to the fifth digit.

Radiology Cases of Central Polydactyly

Radiograph of syndactaly and polydactaly.
Radiograph of the hands shows bilateral fusion of the soft tissues of the third and fourth digits. In the right hand there is fusion of the distal third and fourth phalanges. There are extra phalanges in the left fourth digit which are fused to their counterparts distally and proximally.