Bilateral sleeve fracture of the superior pole of the patella in a healthy adult: A case report

Figure 1 Preoperative physical examination showed a palpable gap over the upper part of the patella in both knees.

Figure 2 Preoperative magnetic resonance imaging showed the bilateral sleeve fracture of the superior pole of the patella. A: Coronary magnetic resonance imaging (MRI) in the right knee; B: Sagittal MRI in the right knee; C: Coronary MRI in the left knee; D: Sagittal MRI in the left knee.

Figure 3 Preoperative and intraoperative photos. A: Patient in the supine position with an anterior approach incision in both knees; B-E: Intraoperative photographs. A thin shell of avulsed bone in the right knee (B); A thin shell of avulsed bone in the left knee (C); Two 4.5-mm suture anchors placed on the upper part of the patella in the right knee (D); The autogenous gracilis was applied to augment the stability by performing the figure-of-eight technique in the right knee (E).

Figure 4 Plain radiography of bilateral knee joints after surgery. A: Anteroposterior radiography of bilateral knee joints; B: Lateral radiography of right knee joint; C: Lateral radiography of left knee joint.

Figure 5 Follow-up at 6 weeks after surgery. A and B: Range of motion of bilateral knee joints; C and D: Gait of the patient.