Figure 1From: Calcaneus secundarius – a relevant differential diagnosis in ankle pain: a case report and review of the literatureLocation of mentioned accessory ossicles of the foot. 1. Calcaneus secundarius, 2. os vesalianum, 3. calcaneus accessorius, 4. os tibiale externum, 5. os trigonum, 6. os cuboideum secundarium (plantar), 7. os sustentaculum secundarium (medial to calcaneus), and 8. os peroneum.Back to article page