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Ankle and Foot 47 - Department of Radiology - University of ...

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2290 VII Imaging <strong>of</strong> the Musculoskeletal System<br />

A<br />

Figure <strong>47</strong>-94. Calcaneonavicular coalition in an 11-<br />

year-old with right foot pain. A, Oblique radiograph<br />

shows the abnormal joint in this nonosseous coalition<br />

(arrowheads in magnified dashed box). B, Axial<br />

oblique CT scan through the bottoms <strong>of</strong> the talar<br />

heads (H) shows the symptomatic coalition on the<br />

right foot (black arrowhead) between the elongated<br />

anterior process <strong>of</strong> the calcaneus (APC) <strong>and</strong> the<br />

navicular (N). Incidentally seen is an asymptomatic<br />

coalition on the left (white arrowhead) between the<br />

abnormally broad APC <strong>and</strong> the navicular. C, Axial<br />

oblique CT scan slightly plantar to B. On the right foot<br />

is the symptomatic abnormal joint (arrowhead)<br />

between the broad APC <strong>and</strong> the navicular. On the left<br />

is an extra bone, an os calcaneus secondarius (OCS),<br />

articulating with both the APC <strong>and</strong> navicular.<br />

B<br />

C<br />

Ch0<strong>47</strong>-A05375.indd 2290<br />

9/9/2008 5:35:45 PM

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