Peroneus Quartus

Peroneus quartus muscle and tendon.

Prevalence: 12-22%

Originates at the distal lateral portion of the fibula and descends medial and posterior to the peroneal tendons.

Insertion is variable and includes the retrotrochlear eminence of the calcaneus, the phalanx or the metatarsal bone of the fifth toe, the peroneal tendons, the lateral retinaculum of the ankle, and the cuboid bone.

Also: incidental Achilles Tendinosis

Achilles Tendinosis and small intrasubstance tear

Haglund's Syndrome

Haglund's = Insertional Achilles tendinosis, calcaneal marrow oedema, retro-calcaneal bursitis and retro Achilles bursitis