Deep lateral femoral notch sign

Measurement technique to determine the depth of the femoral notch on lateral x-rays

In radiology, the deep lateral femoral notch sign is a finding on a lateral radiograph that is considered an indirect sign of a torn anterior cruciate ligament (ACL).^[1]^[2] It is an abnormal deepening of the lateral condylopatellar sulcus from an osteochondral impaction fracture.^[1]^[3] A depth greater than 1.5 mm is a reliable sign of a torn ACL.^[1]

References

^ ^a ^b ^c Pao, D. G. (2001). "The lateral femoral notch sign". Radiology. 219 (3): 800–801. doi:10.1148/radiology.219.3.r01jn12800. PMID 11376273.
^ Cobby, M. J.; Schweitzer, M. E.; Resnick, D. (1992). "The deep lateral femoral notch: An indirect sign of a torn anterior cruciate ligament". Radiology. 184 (3): 855–858. doi:10.1148/radiology.184.3.1509079. PMID 1509079.
^ Yu, J. S.; Bosch, E.; Pathria, M. N.; McAndless, M.; Mishra, D.; Daniel, D.; Clopton, P.; Resnick, D. (1995). "Deep lateral femoral sulcus: Study of 124 patients with anterior cruciate ligament tear". Emergency Radiology. 2 (3): 129. doi:10.1007/BF02615790. S2CID 20538659.

[Pao-1] Pao, D. G. (2001). "The lateral femoral notch sign". Radiology. 219 (3): 800–801. doi:10.1148/radiology.219.3.r01jn12800. PMID 11376273.

[Cobby-2] Cobby, M. J.; Schweitzer, M. E.; Resnick, D. (1992). "The deep lateral femoral notch: An indirect sign of a torn anterior cruciate ligament". Radiology. 184 (3): 855–858. doi:10.1148/radiology.184.3.1509079. PMID 1509079.

[Yu-3] Yu, J. S.; Bosch, E.; Pathria, M. N.; McAndless, M.; Mishra, D.; Daniel, D.; Clopton, P.; Resnick, D. (1995). "Deep lateral femoral sulcus: Study of 124 patients with anterior cruciate ligament tear". Emergency Radiology. 2 (3): 129. doi:10.1007/BF02615790. S2CID 20538659.

[1]

[2]

[3]