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|author1=[[User:Mikael Häggström|Mikael Häggström]]
|author2=
}}
==Planning==
X-ray scanogram or 3-joint standing X-ray with ruler.<ref name=ColumbiaU>{{cite web|url=https://www.columbiadoctors.org/condition/leg-length-discrepancy-pediatric|title=Leg Length Discrepancy (Pediatric)|website=[[Columbia University]]|accessdate=2019-02-14}}</ref> Full limb X-ray should not be used because of projectional distortion.
==Evaluation==
[[File:Leg length measurement on X-ray.jpg|thumb|150px|[[Projectional radiography|X-rays]] for leg length measurement.]]
Measure the femur and the tibia both separately and combined. Various measuring points for these purposes have been described,<ref group="notes" name="differences">Apart from the points mentioned in this article, articles have suggested for example a line between the femoral condyles for both the femur and the tibia as a surrogate for both the distal end of the femur and the proximal end of the tibia:<br>- {{cite journal|last1=Werlang|first1=Henrique Zambenedetti|last2=Oliveira|first2=Gabriel Antônio de|last3=Tamelini|first3=Ana Maria|last4=Madalosso|first4=Ben Hur|last5=Maciel Júnior|first5=Francisco da Silva|title=Escanometria dos membros inferiores: revisitando Dr. Juan Farill|journal=Radiologia Brasileira|volume=40|issue=2|year=2007|pages=137–141|issn=0100-3984|doi=10.1590/S0100-39842007000200014}}<br>Another definition of femoral length is between the center of the femoral head and the center of the femoral notch, and the tibia length as between the center of the tibial plateau and the center of the tibial plafond.<br>- {{cite journal|last1=Guenoun|first1=B.|last2=Zadegan|first2=F.|last3=Aim|first3=F.|last4=Hannouche|first4=D.|last5=Nizard|first5=R.|title=Reliability of a new method for lower-extremity measurements based on stereoradiographic three-dimensional reconstruction|journal=Orthopaedics & Traumatology: Surgery & Research|volume=98|issue=5|year=2012|pages=506–513|issn=18770568|doi=10.1016/j.otsr.2012.03.014}}</ref> but a functional method is to measure the distances between joint surfaces:<ref name=Sabharwal2008>{{cite journal|last1=Sabharwal|first1=Sanjeev|last2=Kumar|first2=Ajay|title=Methods for Assessing Leg Length Discrepancy|journal=Clinical Orthopaedics and Related Research|volume=466|issue=12|year=2008|pages=2910–2922|issn=0009-921X|doi=10.1007/s11999-008-0524-9}}</ref>
*Femur length: The superior aspect of the femoral head and the distal portion of the medial femoral condyle.
*Tibial length: The medial tibial plateau and the tibial plafond.
==Report==
*Femoral and tibial length on both sides, their difference, as well as the points used for the measurement.<ref group="notes" name="differences"/>
*Total length of these, and their difference.
{{Bottom}}
|author1=[[User:Mikael Häggström|Mikael Häggström]]
|author2=
}}
==Planning==
X-ray scanogram or 3-joint standing X-ray with ruler.<ref name=ColumbiaU>{{cite web|url=https://www.columbiadoctors.org/condition/leg-length-discrepancy-pediatric|title=Leg Length Discrepancy (Pediatric)|website=[[Columbia University]]|accessdate=2019-02-14}}</ref> Full limb X-ray should not be used because of projectional distortion.
==Evaluation==
[[File:Leg length measurement on X-ray.jpg|thumb|150px|[[Projectional radiography|X-rays]] for leg length measurement.]]
Measure the femur and the tibia both separately and combined. Various measuring points for these purposes have been described,<ref group="notes" name="differences">Apart from the points mentioned in this article, articles have suggested for example a line between the femoral condyles for both the femur and the tibia as a surrogate for both the distal end of the femur and the proximal end of the tibia:<br>- {{cite journal|last1=Werlang|first1=Henrique Zambenedetti|last2=Oliveira|first2=Gabriel Antônio de|last3=Tamelini|first3=Ana Maria|last4=Madalosso|first4=Ben Hur|last5=Maciel Júnior|first5=Francisco da Silva|title=Escanometria dos membros inferiores: revisitando Dr. Juan Farill|journal=Radiologia Brasileira|volume=40|issue=2|year=2007|pages=137–141|issn=0100-3984|doi=10.1590/S0100-39842007000200014}}<br>Another definition of femoral length is between the center of the femoral head and the center of the femoral notch, and the tibia length as between the center of the tibial plateau and the center of the tibial plafond.<br>- {{cite journal|last1=Guenoun|first1=B.|last2=Zadegan|first2=F.|last3=Aim|first3=F.|last4=Hannouche|first4=D.|last5=Nizard|first5=R.|title=Reliability of a new method for lower-extremity measurements based on stereoradiographic three-dimensional reconstruction|journal=Orthopaedics & Traumatology: Surgery & Research|volume=98|issue=5|year=2012|pages=506–513|issn=18770568|doi=10.1016/j.otsr.2012.03.014}}</ref> but a functional method is to measure the distances between joint surfaces:<ref name=Sabharwal2008>{{cite journal|last1=Sabharwal|first1=Sanjeev|last2=Kumar|first2=Ajay|title=Methods for Assessing Leg Length Discrepancy|journal=Clinical Orthopaedics and Related Research|volume=466|issue=12|year=2008|pages=2910–2922|issn=0009-921X|doi=10.1007/s11999-008-0524-9}}</ref>
*Femur length: The superior aspect of the femoral head and the distal portion of the medial femoral condyle.
*Tibial length: The medial tibial plateau and the tibial plafond.
==Report==
*Femoral and tibial length on both sides, their difference, as well as the points used for the measurement.<ref group="notes" name="differences"/>
*Total length of these, and their difference.
{{Bottom}}
