Bilateal absence of tarsal navicular bone
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Chronic pain of the feet.
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The CT scan demonstrates:
- absence of the tarsal navicular bone bilaterally with enlarged talar head and elongated talar neck
- decreased joint space between the talus and cuneiform bones with sclerotic changes, osteophytes, and subchondral geodes
- degenerative changes are also noted of the anterior talocalcaneal joint as well as the cuneocuboid joint
CT features of bilateral congenital absence of the tarsal navicular bone with secondary degenerative changes of the midtarsal joints.