Achilles tendon rupture is a complete disruption of the Achilles tendon, usually occurring 2–6 cm proximal to its calcaneal insertion, where blood supply is the poorest. It can be associated with preexisting tendon degeneration and micro trauma.
The Achilles tendon is the most frequently ruptured tendon. The patient has a sudden, acute pain in the Achilles tendon with an audible snap or tear that is often described as “like being hit or kicked in the back of the leg.”
Three types of indirect forces have been described: