Patient with stiff knee 1 decade after TKA

Inflammatory markers (C-reactive protein, erythrocyte sedimentation rate and interleukin-6) were within normal limits and nuclear studies did not reveal any signs of infection, but confirmed loosening of femoral and tibial components. [...]evaluation of the TTO showed the proximal aspect of the patellar tendon had calcified on the undersurface of the tendon. Additionally, patients with history of previous patellar tendon injury, like the one presented, require additional caution to avoid disruption of the extensor mechanism when mobilizing or everting the patella. Albeit infrequent, reported complications include nonunion, tibial tubercle fractures, migration, anterior knee pain and stiffness.