Figure 8. Longitudinal incision measuring about 6 cm and central opening of the tendon, preserving lateral insertions. Exposure of the distal portion of the tendon fibres, visualisation of calcifications (red arrow), bursae, synovial hypertrophy and posterior tuberosity of the calcaneus. Debridement of metaplastic tendon tissue and bursa, removal of calcifications, levelling and ostectomy of the posterior tuberosity. Reinsertion.