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Fig. 8B —Cross-sectional depiction of second metatarsal head at level
of metatarsophalangeal joint. CT scan (A), high-resolution radiograph
(B), and gross specimen (C) show several normal osseous contours
of lesser metatarsal heads that simulate erosive changes. These include sharp
osseous groove (A) between medial and lateral tubercles (B), centralized
medial and lateral osseous concavities (C), and plantar concavity (D) that
separates smaller medial plantar prominence (E) from more prominent lateral
prominence (F). Note smooth convex dorsal surface that is devoid of osseous
protuberances or depressions.
