Proposed flow chart of tendon degeneration starting with the healthy Achilles tendon and extrinsic a nd/or intrinsic factors over asymptomatic states with increase in tendon diameter and detectable capillary blood flow and/or Power Doppler flow to symptomatic states and consecutive tendon rupture. Created by Knobloch with accomplishments to Richards et al. 2005, Maffuli et al. 2000, Kannus et Josza 1991.
Knobloch Journal of Orthopaedic Surgery and Research 2008 3:18 doi:10.1186/1749-799X-3-18