Q. 'Tooth sign' is not related to teeth but is found in ?
a. Carpal bones
b. Upper cervical vertebrae
c. tarsal bones
d. Patella
e. Skull bones
Answer -
d
Tooth sign is radiological sign suggestive of quadriceps insertional degeneration, tendinopathy or enthesopathy.
The resulting picture is of vertical ridging or spurring and osteophyte over patella at insertion site of quadriceps tendon (schematic image below )
Better seen in skyline patella views.
a. Carpal bones
b. Upper cervical vertebrae
c. tarsal bones
d. Patella
e. Skull bones
Answer -
d
Tooth sign is radiological sign suggestive of quadriceps insertional degeneration, tendinopathy or enthesopathy.
The resulting picture is of vertical ridging or spurring and osteophyte over patella at insertion site of quadriceps tendon (schematic image below )
Better seen in skyline patella views.
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