Patellar tendinitis (Jumper's knee)
Anterior knee pain. The patient is football player.
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The proximal attachment of patellar tendon is thickened and displays focal intermediate signal in T1 and bright signal in STIR.
Features are consistent of patellar tendinitis (also called jumper's knee) which occurs in atheletes predisposed by frequent jumping lead to chronic overuse.
Classification of the signal intensity (axial images) of the ligament :
- Grade 0: Normal tendon appearances
- Grade 1: Increased signal intensity in less than 25% of the axial cross-sectional tendon width
- Grade 2: Increased high-signal intensity in 25% to 50% of the axial cross-sectional tendon width.
- Grade 3: Increased high-signal intensity occupying more than 50% of the axial cross-sectional tendon width.