Ventral trochlear prominence

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Ventral trochlear prominence describes and measures the bony surplus in the anterior femoral surface at the most superior or proximal aspect of trochlea.

Usage

Ventral trochlear prominence ~~(LTI)~~ is used for the assessment of trochlear dysplasia, a risk factor for patellofemoral instability ^1-4 in sagittal magnetic ~~rresonance~~resonance images. It can be seen as an analogue to Henri Dejour’s trochlear bump ^1-3.

A review about the quality assessment of measurements for trochlear dysplasia identified the ventral trochlear prominance as one of the more usefulmeasurements ⁴.

Measurement

The distance between an extension line of the anterior, supratrochlear femoral cortical surface and the most anterior cartilaginous surface of the trochlear groove is measured¹. The measurement is conducted on a sagittal plane through the trochlear groove ¹.

Interpretation

A cut-off value of≥ 8mm indicates trochlear dysplasia, with a reported sensitivity and specificityof 75% and 83% respectively ¹.

History and etymology

Ventral trochlear prominence as an assessment tool for trochlear dysplasia in MRI was introduced by CW.Pfirrmnann ¹ as an analogue of Henri Dejours trochlear bump ².

-<p><strong><strong>Ventral trochlear prominence </strong></strong>describes and measures the bony surplus in the anterior femoral surface at the most superior or proximal aspect of trochlea.</p><h4>Usage</h4><p>Ventral trochlear prominence (LTI) is used for the assessment of trochlear dysplasia, a risk factor for patellofemoral instability <sup>1-4</sup> in sagittal magnetic rresonance images. It can be seen as an analogue to Henri Dejour’s trochlear bump <sup>1-3</sup>.</p><p>A review about the quality assessment of measurements for trochlear dysplasia identified the ventral trochlear prominance as one of the more useful measurements <sup>4</sup>.</p><h4>Measurement</h4><p>The distance between an extension line of the anterior, supratrochlear femoral cortical surface and the most anterior cartilaginous surface of the trochlear groove is measured <sup>1</sup>. The measurement is conducted on a sagittal plane through the trochlear groove <sup>1</sup>.</p><h4>Interpretation</h4><p>A cut-off value of ≥ 8mm indicates trochlear dysplasia, with a reported sensitivity and specificityof 75% and 83% respectively <sup>1</sup>.</p><h4>History and etymology</h4><p>Ventral trochlear prominence as an assessment tool for trochlear dysplasia in MRI was introduced by CW.Pfirrmnann <sup>1</sup> as an analogue of Henri Dejours trochlear bump <sup>2</sup>.</p><h4>See also</h4><ul>
~~-<li>trochlear dysplasia</li>~~
~~-<li>patellofemoral instability</li>~~
+<p><strong><strong>Ventral trochlear prominence </strong></strong>describes and measures the bony surplus in the anterior femoral surface at the most superior or proximal aspect of trochlea.</p><h4>Usage</h4><p>Ventral trochlear prominence is used for the assessment of <a href="/articles/trochlear-dysplasia">trochlear dysplasia</a>, a risk factor for <a href="/articles/patellofemoral-instability">patellofemoral instability</a> <sup>1-4</sup> in sagittal magnetic resonance images. It can be seen as an analogue to Henri Dejour’s trochlear bump <sup>1-3</sup>.</p><p>A review about the quality assessment of measurements for trochlear dysplasia identified the ventral trochlear prominance as one of the more useful measurements <sup>4</sup>.</p><h4>Measurement</h4><p>The distance between an extension line of the anterior, supratrochlear femoral cortical surface and the most anterior cartilaginous surface of the trochlear groove is measured. The measurement is conducted on a sagittal plane through the trochlear groove <sup>1</sup>.</p><h4>Interpretation</h4><p>A cut-off value of ≥ 8mm indicates trochlear dysplasia, with a reported sensitivity and specificityof 75% and 83% respectively <sup>1</sup>.</p><h4>History and etymology</h4><p>Ventral trochlear prominence as an assessment tool for trochlear dysplasia in MRI was introduced by CW.Pfirrmnann <sup>1</sup> as an analogue of Henri Dejours trochlear bump <sup>2</sup>.</p><h4>See also</h4><ul>
+<li><a href="/articles/trochlear-dysplasia">trochlear dysplasia</a></li>
+<li><a href="/articles/patellofemoral-instability">patellofemoral instability</a></li>

References changed:

1. Pfirrmann C, Zanetti M, Romero J, Hodler J. Femoral Trochlear Dysplasia: MR Findings. Radiology. 2000;216(3):858-64. <a href="https://doi.org/10.1148/radiology.216.3.r00se38858">doi:10.1148/radiology.216.3.r00se38858</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/10966723">Pubmed</a>
2. Dejour H, Walch G, Nove-Josserand L, Guier C. Factors of Patellar Instability: An Anatomic Radiographic Study. Knee Surg Sports Traumatol Arthrosc. 1994;2(1):19-26. <a href="https://doi.org/10.1007/BF01552649">doi:10.1007/BF01552649</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/7584171">Pubmed</a>
3. Ngai S, Smitaman E, Resnick D. Trochlear Dysplasia. Radsource – June 2018. <a href="https://radsource.us/trochlear-dysplasia/#fn-6565-16"> MRI Web Clinic</a>
4. Paiva M, Blønd L, Hölmich P et al. Quality Assessment of Radiological Measurements of Trochlear Dysplasia; a Literature Review. Knee Surg Sports Traumatol Arthrosc. 2017;26(3):746-55. <a href="https://doi.org/10.1007/s00167-017-4520-z">doi:10.1007/s00167-017-4520-z</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/28315921">Pubmed</a>

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