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Diagnostic ultrasound ( PDFDrive )

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CHAPTER 55 The Pediatric Hip and Other Musculoskeletal Ultrasound Applications 1935

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FIG. 55.10 Lateral Dislocation of the Patella. (A) Transverse ultrasound of the knee shows the cartilage of the femoral epiphysis (e) and

empty intercondylar notch (arrow). (B) More inferior image shows cartilaginous femoral condyles (e) and laterally dislocated patellar cartilage (p).

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FIG. 55.11 Superior Dislocation of the Patella. (A) Anterior sagittal sonogram of the dislocated patella (p). f, Distal femur; arrow, knee joint.

(B) Anterior sagittal view of the knee joint. The femur (f) and the tibia (t) are normally aligned with a very thin hypoechoic band anteriorly representing

a dysplastic patellar tendon (arrow). The patella is not visible. (C) Sagittal magnetic resonance imaging demonstrates the superiorly dislocated

patella and very thin patellar tendon.

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