ABSTRACT
Cartilage injuries of the knee occur frequently in professional and amateur athletes
and can be associated with severe debilitation and morbidity. They are commonly associated
with ligament injuries but also may be frequently isolated. Increasing awareness and
advances in magnetic resonance imaging (MRI) have led to increasing diagnosis and
recognition of these injuries. Articular cartilage is just 2 to 4 mm thick and is
avascular, alymphatic, and aneural. It has a limited capacity for healing, and there
has been increasing use of cartilage repair techniques to treat these lesions in the
active population. Strategies for cartilage repair include marrow stimulation techniques
such as microfracture/drilling, osteochondral grafting, and autologous chondrocyte
transplants. MRI is an important tool in the diagnosis and grading of cartilage injury
and is useful in the follow-up and monitoring of these repair procedures. It is important
for radiologists and clinicians to be aware of the capabilities and limitations of
MRI in assessing cartilage injury and to be familiar with common postsurgical appearances
to facilitate assessment and follow-up in this population. This article reviews the
clinical findings and MRI imaging appearances of cartilage injury. The management
options are discussed as well as common postsurgical appearances following the various
interventions.
KEYWORDS
Cartilage - articular - athletic injuries - MRI - arthroscopy
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Richard J. HughesM.A. M.R.C.P. F.R.C.R.
Department of Radiology, Stoke Mandeville Hospital, Mandeville Road
Aylesbury HP21 8AL, UK
eMail: Richard.Hughes@buckshosp.nhs.uk
