Radiology
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published online before print September 13, 2002, 10.1148/radiol.2252011810
This Article
Right arrow Figures Only
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow All Versions of this Article:
2252011810v1
225/2/537    most recent
Right arrow Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Huang, G.-S.
Right arrow Articles by Yu, J. S.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Huang, G.-S.
Right arrow Articles by Yu, J. S.
(Radiology 2002;225:537-540.)
© RSNA, 2002

Musculoskeletal Imaging

Acute Anterior Cruciate Ligament Stump Entrapment in Anterior Cruciate Ligament Tears: MR Imaging Appearance1

Guo-Shu Huang, MD, Chian-Her Lee, MD, Wing P. Chan, MD, Herng-Sheng Lee, MD, Cheng-Yu Chen, MD and Joseph S. Yu, MD

1 From the Departments of Radiology (G.S.H., C.Y.C.), Orthopedic Surgery (C.H.L.), and Pathology (H.S.L.), Tri-Service General Hospital, National Defense Medical Center, No. 325, Section 2, Cheng-Kung Rd, Neihu, Taipei 114, Taiwan, R.O.C.; Department of Radiology, Taipei Medical University-Municipal Wan Fang Hospital, Taipei, Taiwan, R.O.C. (W.P.C.); and Department of Radiology, Ohio State University Medical Center, Columbus (J.S.Y.). Received November 9, 2001; revision requested December 12; revision received March 1, 2002; accepted April 3. Address correspondence to G.S.H. (e-mail: gsh5@seed.net.tw).

PURPOSE: To describe the magnetic resonance (MR) imaging appearance of anterior cruciate ligament (ACL) stump entrapment in patients who presented with decreased knee extension after rupturing the ACL.

MATERIALS AND METHODS: MR images in 15 patients who had presented with a block to terminal knee extension after sustaining an ACL tear were retrospectively reviewed. The MR imaging appearances of entrapped ACL stumps were defined and correlated with arthroscopic and histologic findings.

RESULTS: The entrapped ACL stumps had two distinct appearances. Type 1 stumps (n = 11) were characterized by a nodular mass located at the anterior aspect of the intercondylar notch, interposed between the lateral femoral condyle and tibia. Type 2 stumps (n = 4) were characterized by a tonguelike free end and angulation of the stump. Histologic evaluation of the resected specimens showed distorted ACL fibers intermixed with variable fibrosis and inflammation.

CONCLUSION: Entrapment of an ACL stump can limit knee extension. The two observed appearances of entrapped ACL stumps likely represent two points along a spectrum of appearances, which possibly includes the cyclops lesion.

© RSNA, 2002

Index terms: Knee, injuries, 452.4191, 452.4852, 452.4857 • Knee, ligaments, menisci, and cartilage, 452.4191, 452.4852, 452.4857 • Knee, MR, 452.121411, 452.121412, 452.121416






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
RADIOLOGY RADIOGRAPHICS RSNA JOURNALS ONLINE
Copyright © 2002 by the Radiological Society of North America.