guidebook. - Fanconi Anemia Research Fund

Chapter 5: Hand and Arm Differences in FA
105
Figure 6: Three-year-old child following right index finger pollicization
with satisfactory appearance and function including
grasping large and small objects. (Courtesy of Shriners Hospital
for Children, Philadelphia)
Triphalangeal thumb
A triphalangeal thumb has an extra phalanx of variable
size and shape. A small extra phalanx that is normally
shaped can be treated without surgery (Figure 7).
Figure 7: Nine-year-old child with bilateral triphalangeal thumbs
that are slightly angulated and longer than a normal thumb.