subfascial prepatellar bursa

sub·fas·cial pre·pa·tel·lar bur·sa

[TA]
a commonly occurring bursa between the fascia lata or superficial (transverse) prepatellar aponeurosis and the intermediate (oblique) prepatellar aponeurosis formed by the medial and lateral patellar retinacular layers (extensions of the vastus tendons) anterior to the patella.