Extension of the Lower Limbs for Extreme Flexion of Knee Joint Induced by Dorsal Scar Adhesion After Burned for 13 Years in a Child

The patient is a 17-year-old man. After burned by a roast basin at the age of 4 years, the patient’s right lower limb developed flexion and limb-adhesion deformities due to the absence of medical intervention, and the patient could not stand upright legs and squatted for 13 years. Later, he was hospitalized in our hospital. Specific examination: The entire right thigh and the back of the leg adhered together by a webbed scar. The right knee joint was in flexion position and could not be straightened (Fig. 26.1), and the active and passive activities range was: 150° (flexion)–140° (extension)–0. The right lower limb muscle had atrophy, and the muscle strength was level IV. The right ankle joint had varus deformity, the blood supply at the terminals of the toes was good, sensation was normal, and toe muscle strength was level IV. The right thigh was approximately 37.5 cm long, the calf was approximately 36 cm long, the left thigh was approximately 40 cm long, and the left leg was approximately 38 cm long. The affected side was approximately 4.5 cm shorter than that of the unaffected side. X-ray of knee joint revealed that the right knee joint had flexion deformity, could not extend, the right knee joint was normal, the position relationship was basically normal, the bone structures of the knee joint were intact and continuous, and the diaphysis joints were small. No other abnormalities were found.