Jihoon Cha MD, Abstract Co-Author: Nothing to Disclose

Sang-Hee Choi MD, Abstract Co-Author: Nothing to Disclose

Jong Won Kwon MD, Abstract Co-Author: Nothing to Disclose

Jin-Young Jung MD, Abstract Co-Author: Nothing to Disclose

Suk Kyeong Ji, Presenter: Nothing to Disclose

The aim of this study was to compare cyclops lesions after anterior cruciate ligament (ACL) reconstruction using the single-bundle and the remnant bundle preservation techniques.

100 consecutive patients, who had undergone postoperative MRI of the knee followed by arthroscopic ACL reconstruction with the remnant bundle preservation technique between February 2007 and August 2010 were enrolled in this study. 36 consecutive patients who underwent ACL reconstruction using the single bundle technique were also included in this study as a control group. MR findings were scored based on pre-ACL graft lesion as 0, 1, 2, or 3 (0, normal; 1, a few strands; 2, non-nodular lesion; 3, nodular lesion beyond the intercondylar notch line) on sagittal images. Sixty-one patients underwent 2nd look surgery (20 in group S, 41 in group R). Specimens were pathologically examined.

Numbers of patients with score 0, 1, 2, or 3 in the S and R groups were 1, 18, 14, 3 and 4, 60, 29, 7, respectively. Of the patients who underwent 2nd look surgery, 8 had a cyclops lesion (3 of 20 in group S and 5 of 41 in group R). The incidence of cyclops lesion was not significantly different in group R and group S (P = 0.761). The major MR finding of a cyclops lesion was intermediate signal intensity nodular protruding lesion beyond the intercondylar notch line on sagittal images.

The incidence of a cyclops lesion was similar in both groups. This comparative analysis of the appearance of cyclops lesions after single-bundle and remnant preservation ACL reconstructions should allow radiologists to better diagnose cyclops lesions.

This comparative analysis of the appearance of cyclops lesions after single-bundle and remnant preservation ACL reconstructions enables radiologists to differentiate cyclops lesions more easily.

Cha, J, Choi, S, Kwon, J, Jung, J, Ji, S, Analysis of Cyclops Lesions after Different Anterior Cruciate Ligament Reconstructions: A Comparison of the Single-Bundle and Remnant Bundle Preservation Techniques.  Radiological Society of North America 2011 Scientific Assembly and Annual Meeting, November 26 - December 2, 2011 ,Chicago IL. http://archive.rsna.org/2011/11014206.html