Pseudocyclops: two cases of ACL graft partial tears mimicking cyclops lesions on MRI.

Abstract:

:Arthroscopic reconstruction of the anterior cruciate ligament (ACL) using autografts or allografts is a common surgical procedure, particularly in young athletes. Although the procedure has excellent success rates, complications such as mechanical impingement, graft rupture, and arthrofibrosis can occur, often necessitating additional surgery. Magnetic resonance (MR) imaging has become a valuable tool in evaluating complications after ACL reconstruction. We report two cases of ACL reconstruction complicated by arthroscopically proven partial graft tears. In both cases the torn anterior graft fibers were flipped into the intercondylar notch, mimicking anterior arthrofibrosis, i.e., a "cyclops lesion," on MR imaging. Careful review of the direction of graft fibers on MR imaging in the "pseudocyclops" lesions can help differentiate these partial tears from the fibrosis of a true cyclops. The "pseudocyclops" lesion is a previously undescribed MR imaging sign of partial ACL graft tear. Larger studies are required to determine the sensitivity and specificity of the sign, as well as the clinical importance of these partial graft tears.

journal_name

Skeletal Radiol

journal_title

Skeletal radiology

authors

Simpfendorfer C,Miniaci A,Subhas N,Winalski CS,Ilaslan H

doi

10.1007/s00256-015-2100-1

subject

Has Abstract

pub_date

2015-08-01 00:00:00

pages

1169-73

issue

8

eissn

0364-2348

issn

1432-2161

journal_volume

44

pub_type

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