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


     

This Article
Right arrow Figures Only
Right arrow Full Text
Right arrow Full Text (PDF)
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 HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Jaramillo, D.
Right arrow Articles by Shapiro, F.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Jaramillo, D.
Right arrow Articles by Shapiro, F.
(Radiology. 2000;215:504-511.)
© RSNA, 2000

Experimental Studies

Cartilaginous Path of Physeal Fracture-Separations: Evaluation with MR Imaging-An Experimental Study with Histologic Correlation in Rabbits1

Diego Jaramillo, MD, Bamidele F. Kammen, MD 2 and Frederic Shapiro, MD

1 From the Departments of Radiology (D.J., B.F.K.) and Orthopaedic Surgery (F.S.), Children's Hospital and Harvard Medical School, 300 Longwood Ave, Boston, MA 02115. Received June 1, 1998; revision requested July 22; final revision received August 30, 1999; accepted September 14. Supported in part by RSNA Research and Education Foundation and by National Institutes of Health grant AR42396-05. Address correspondence to D.J.

PURPOSE: To define the transverse levels of intracartilaginous fractures by using magnetic resonance (MR) imaging and histologic analysis in experimental physeal fracture-separations.

MATERIALS AND METHODS: Physeal fracture-separations were evaluated with MR imaging in 28 distal femurs and 28 proximal tibias of 22 immature rabbits. The intraphyseal transverse level of injury was graded as juxtaepiphyseal (germinal or proliferative zones) or juxtametaphyseal (hypertrophic zone or zone of provisional calcification). Histologic sections from 23 specimens were studied to assess correlations. We assessed nonenhanced and gadolinium-enhanced T1-weighted, intermediate-weighted, T2-weighted, and spoiled gradient-recalled-echo T1-weighted images.

RESULTS: In all MR studies, the injury was visible as a cleft of signal intensity lower than the signal intensity of the physeal cartilage. Juxtaepiphyseal extension, seen in 18 (64%) of 28 fractures, was more frequent in the undulating central part of the distal femoral physis than in the flatter proximal tibial physis (P = .008). In 20 of 23 specimens, MR imaging and histologic findings had excellent correlation for the detection of fracture level and morphology.

CONCLUSION: The course and level of injury within the cartilage in physeal fracture-separations can be defined with MR imaging. Extension into the juxtaepiphyseal physis, a potential risk factor for growth arrest, is detectable with MR imaging; MR imaging and histologic findings correlate well.

Index terms: Animals • Bones, epiphyses, 451.414, 454.414 • Bones, growth and development, 451.433 • Bones, injuries, 451.414, 454.414 • Cartilage • Cartilage, MR, 451.12141, 451.485, 454.12141, 454.485 • Experimental study • Fractures, MR, 451.12141, 451.414, 454.12141, 454.414 • Knee, MR, 451.121411, 451.121412, 451.121415, 451.12143, 454.121411, 451.121412, 451.121415, 451.12143




This article has been cited by other articles:


Home page
 Am. J. Roentgenol.Home page
K. Ecklund and D. Jaramillo
Patterns of Premature Physeal Arrest: MR Imaging of 111 Children
Am. J. Roentgenol., April 1, 2002; 178(4): 967 - 972.
[Abstract] [Full Text] [PDF]