Use of Ilizarov technique for bilateral knees flexion contracture in Juvenile-onset ankylosing spondylitis: A case report

Figure 1 Preoperative squatting gait. A: Frontal view; B: Lateral view; C: Posterior view.

Figure 2 Range of motion of bilateral knees. A: Range of motion of right knee was 75°-135°; B: Range of motion of left knee was 55°-135°.

Figure 3 Radiographic changes in the spine, hip joints and sacroiliac joints. A and B: Plain radiographies of spine showed bamboo spine; C and D: Plain radiography of pelvis and computed tomography scan of pelvis showed sacroiliac joint fusion; E: Computed tomography scan of hips revealed osteoarthritic changes.

Figure 4 Radiographic changes in the knee joints and feet. A and B: X-rays of the knees revealed osteophytes and bilateral knee flexion contracture; C and D: Plain radiography of ankles showed narrowing of ankle joints space and ankylosing tarsitis.

Figure 5 Postoperative X-rays of the bilateral knee joints. A: The right knee; B: The left knee.

Figure 6 Clinical images before removal of bilateral lower limb ring external fixators. A: Standing with ring external fixator; B: Showing almost full extension of bilateral knees.

Figure 7 Images after removal of bilateral lower limb ring external fixators. A and B: Lateral X-rays of bilateral knees; C: Standing up and walking with a walker.

Figure 8 Clinical photographs of the patient after removal of the long-legged brace (12 mo after the operation). A: Frontal view; B: Lateral view; C: Posterior view.