Rockwood Children CH8

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CHAPTER 8 • Fractures of the Distal Radius and Ulna

Extensor pollicis brevis

NFS

Radial collateral ligament

A

Abductor pollicis longus

Figure 8-15.  Anatomic relationships of the navicular fat stripe (NFS). The NFS, shaded black, is located between the combined tendons of the abductor pollicis longus and extensor pollicis brevis, and the lateral surface of the carpal navicular. (Adapted from Terry DW, Ramen JE. The navicular fat stripe. Ham J Roent Rad Ther Nucl Med . 1975;124:25, with permission.)

B

C

D

Figure 8-14.  A: Subperiosteal hemorrhage from an occult fracture of the distal radius causes an anterior displacement of the normal pro- nator quadratus fat pad ( arrows ). B: A 13-year-old girl with tender- ness over the distal radius after a fall. The only radiographic finding is an anterior displacement of the normal pronator quadratus fat pad ( arrow ). C: The opposite normal side ( arrow indicates normal fat pad ). D: Two weeks later, there is a small area of periosteal new bone forma- tion ( arrow ) anteriorly, substantiating that bony injury has occurred.

Figure 8-16.  AP radiograph of Salter–Harris type III fracture of the distal radius.