MRI features of tuberculosis of the knee.
OBJECTIVE
The objective of this study was to describe the magnetic resonance imaging (MRI) features of tuberculosis (TB) of the knee joint.


METHODS
The MRI features in 15 patients with TB of the knee, as confirmed by histology of the biopsied joint synovium, were reviewed retrospectively. The images were assessed for intra-articular and peri-articular abnormalities.


RESULTS
All patients had florid synovial proliferation. The proliferating synovium showed intermediate to low T2 signal intensity. In the patients who were administered intravenous contrast, the hypertrophic synovium was intensely enhancing. Marrow edema (n = 9), osteomyelitis (n = 4), cortical erosions (n = 5), myositis (n = 6), cellulitis (n = 2), abscesses (n = 3), and skin ulceration/sinus formation (n = 2) were seen in the adjacent bone and soft tissue.


CONCLUSIONS
Synovial proliferation associated with tuberculous arthritis is typically hypointense on T2-weighted images. This appearance, in conjunction with other peri-articular MRI features described, can help in distinguishing TB arthritis from other proliferating synovial arthropathies.
Sanghvi
Darshana A
DA
Department of Radiology, Seth GS Medical College and KEM Hospital, Parel, Mumbai 400012, India.
Iyer
Veena R
VR
Deshmukh
Tejaswini
T
Hoskote
Sumedh S
SS
D003287:Contrast Media; D019786:Gadolinium DTPA; D006801:Humans; D007719:Knee Joint / Q000473:pathology*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D012189:Retrospective Studies; D014394:Tuberculosis, Osteoarticular / Q000473:pathology*
D003287:Contrast Media; D019786:Gadolinium DTPA