Introduction: Treatment is well codified and produces good results when carried out correctly.
In cases where the diagnosis is made early, orthopedic treatment with a series of casts is sufficient to restore normal knee mobility. Delayed treatment leads to complications that make treatment difficult and results unsatisfactory. In these cases, surgery remains the only alternative.
In this paper, we report a case of quadriceps retraction associated with bone deformities due to late diagnosis.
Observation: We report the case of a 15-year-old girl with no particular medical history who presented with quadriceps retraction and bone deformities following intramuscular injections in the thigh. She was treated in our department under spinal anesthesia. We performed a quadriceps release using the Judet technique combined with a distal femoral flexion osteotomy fixed with a locked anatomical plate. The postoperative course was uneventful, with primary healing of the surgical wound and knee rehabilitation.
Conclusion: Post-injection quadriceps retraction still exists in our settings. It can go unnoticed. Late diagnosis leads to morphological bone changes and makes treatment difficult. Surgery then remains the only alternative.