Case: A 24-year-old female diagnosed with fibroblastic osteosarcoma of the patella underwent a total patellectomy and surgical reconstruction with a large bone–tendon allograft of the extensor mechanism and adjuvant chemotherapy. At 5 years' postoperative, the patient has adequate disease control and excellent joint function. Conclusions: Reconstruction with an extensor mechanism allograft is an appropriate alternative for patients with malignant patella tumors without tumor contamination of the joint, allowing for satisfactory knee function and disease control.

Unusual setting of medical care Background: The fibular fracture requires an anatomical reduction. When a malunion occurs, it can lead to a valgus deformity with an opening of the ankle mortise. Case Report: This case deals with a 23-year-old patient with pain and limited movement in the right ankle, caused by a fracture healed in an incorrect position, with shortening of the fibula and progressive displacement of the valgus, after surgery 12 months earlier for an ankle fracture. The patient underwent a corrective procedure consisting of extemporaneous lengthening of the fibula, with interposition of autologous bone graft and fixation using a compression plate. Six months after surgery, the patient did not present pain or limited movement, and was able to return to his habitual sporting activity. Conclusions: Fibular-lengthening osteotomy is a procedure indicated for patients with malunion fracture of the distal fibula, with shortening and progressive valgus deformity. This surgery allows the restoration of the joint surface, reduces stress on the cartilage and prevents the development of arthropathy of the ankle.