Fig. 8
From: Diagnostic accuracy of ultrasonography in the assessment of anterior knee pain
A 45-year-old female with right patellar tendinopathy and infrapatellar plica. a Long axis ultrasound image through the patellar tendon shows a focal thickening of the proximal part of the patellar tendon with a localized hypoechoic area sparing the anterior fibers. (White thick arrow). b and c Two subsequent sagittal PDFS MRI images through intercondylar notch show focal proximal tendon thickening and increased signal intensity (red arrow) sparing the anterior tendon fibers. Infrapatellar plica (white arrow) appears as a curvilinear high signal passing through Hoffa’s fat pad (not detected by ultrasound). P, patella; PT, patellar tendon