Congenital hyper-extension with subluxation of the knees - report of 2 cases.

Congenital dislocation of the knee popularly known as genu recurvatum; is a very rare condition, about 0.45% of all congenital anomalies. Furthermore isolated genu recurvatum is extremely rare because 60% of this condition is associated with other congenital anomalies. Congenital dislocation of hip is the commonest associated anomaly. Two babies 1 male and 1 female were born with severe hyperextension deformity of the knees about 30° degrees. Clinically and radiologically they were diagnosed as isolated genu recurvatum due to congenital dislocation of the knees. Gentle manipulation in the form of passive stretching and knee flexion was started at first day of life. The deformity of male and female baby was corrected in 34 and 30 days respectively. The babies were moving the knees and lower limbs normally at final follow up at 6 months follow up and were confirmed clinically and radiologically. Early recognition and immediate manipulation cures the condition fully in short time without operation.