8. The Convex Triangular Forefoot

The convex triangular forefoot arises in a cavovalgus foot and is characterised by a triangular convex appearance of the ball of the foot due to an equinus posture of the central three metatarsals associated with frontal protrusion of the same metatarsal heads. The first and fifth metatarsals are short and diverge. The toes are compressed together; the first and fifth converge, while the central three develop claw deformities. Joint displacements and contractures involving tendons, capsules and skin render the condition irreversible.