The condylar cutoff sign: quantifying lateral femoral condylar hypoplasia in a complete discoid meniscus.

Clinical Orthopaedics and Related Research
Chul-Won HaJae Chul Park

Abstract

We describe the condylar cutoff sign, a radiographic sign in knees with a discoid lateral meniscus, for diagnosis of complete discoid meniscus. We retrospectively reviewed tunnel-view radiographs of 100 patients (100) knees including 50 with complete discoid lateral meniscus and 50 with normal menisci. All patients were 18 years of age or older. All of the knees were arthroscopically examined. We developed a method to measure the prominence of the femoral condyle adjacent to the intercondylar notch on a tunnel view of the knee. The prominence ratio, the ratio of the medial and lateral condylar prominence, was compared and analyzed. The measurements were performed by three observers on two separate occasions to determine reliability. The intraobserver and interobserver variability study revealed high reliability with correlation coefficients ranging from 0.86 to 0.99. Using a cutoff ratio of 0.8, we observed a major difference between the two groups and found the ratio had 76% sensitivity, 96% specificity, 95% positive predictive value, and 80% negative predictive value in every set of measurements. The sign has high specificity and reliability but might not apply to younger patients. Level II, diagnostic study. See the Guidelin...Continue Reading

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Citations

Apr 29, 2014·Arthroscopy : the Journal of Arthroscopic & Related Surgery : Official Publication of the Arthroscopy Association of North America and the International Arthroscopy Association·Kyoung Ho YoonKee Yun Chung
Oct 19, 2016·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Chul-Won HaYong-Beom Park
Mar 13, 2014·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Sang Hee ChoiSang Hak Lee
Jan 27, 2016·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Wenwei JiangChunxi Yang
Oct 25, 2011·Orthopaedic Surgery·Ye Sun, Qing Jiang
Nov 25, 2014·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Zhihong XuQing Jiang
Feb 24, 2017·Chinese Medical Journal·Xu-Xu ChenHui Kang
Apr 5, 2020·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Yong-Beom ParkJin-Wook Noh
Dec 29, 2019·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Chul-Won HaYong-Beom Park
Oct 13, 2020·Journal of Experimental Orthopaedics·Jun-Ho KimJoon Ho Wang
Jan 10, 2012·Journal of Orthopaedic Science : Official Journal of the Japanese Orthopaedic Association·Goki KameiMitsuo Ochi

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