Table 1. History of surgery undergone by the patient.

	Follow up (month)	Type of surgery
1	0	Knee total resection and reconstruction with distal femur megaprosthesis and tibial allograft-prosthesis composite.
2	1	Surgical wound revision and suturing of the patellar tendon.
3	6	Transposition of medial gastrocnemius muscle flap, transposition of semitendinosus and gracilis tendons, patella-tibia cerclage.
4	39	Revision: polyethylene components replacement and revision of the extensor mechanism.
5	63	Revision: tibial allograft removal, tibial/distal femur prosthesis revision and a coating of Trevira tube over the tibial prosthesis.