Congenital Aplasia of the Patella and the Distal Third of the Quadriceps Mechanism: A Case Report.

CASE: Congenital aplasia or hypoplasia of the patella by itself is a rare condition; to our knowledge, it has been associated with aplasia of the quadriceps mechanism only 3 times in the literature. We describe a 5-year-old boy who had bilateral fixed flexion deformity of the knee as well as bilateral hypoplasia of the patella and quadriceps mechanism; he never had been able to stand upright and walk. We present the clinical and radiographic features, the surgical details, and the successful outcome after treatment.

CONCLUSION

Corrective femoral osteotomies with soft-tissue reconstruction to provide active knee extension provided a satisfactory outcome. At the last follow-up, the child was walking without support and had good active knee extension.