Which finding supports cuboid dysfunction?

• A. Tenderness at the lateral plantar aspect just proximal to the tuberosity of the 5th metatarsal
• B. Tenderness at the medial arch near the 1st metatarsal
• C. Edema over the dorsum of the foot
• D. Pain with resisted dorsiflexion

Answer: (A)

Focal tenderness over the cuboid on the plantar-lateral midfoot is the hallmark sign of cuboid dysfunction. The cuboid sits just proximal to the tuberosity of the 5th metatarsal on the lateral foot, and when it becomes dysfunctional (often a subtle subluxation orMechanical irritation), the joints and ligaments around that area, along with the peroneus longus tendon as it passes beneath the cuboid, become tender. Reproducing pain with palpation at this specific plantar-lateral location near the base of the 5th metatarsal makes this finding the most supportive clue for cuboid syndrome. Edema on the dorsum is nonspecific, medial-arch tenderness points to other arch-related issues, and pain with resisted dorsiflexion implicates the dorsiflexors rather than the cuboid.