Patella-patellar tendon angle in relation to the medial patellar plica syndrome, chondromalacia patella, and infrapatellar fat pad syndrome
Fig 2
Knee MRI and arthroscopic findings of patients in study group.
(a, b) A 21-year-old man with medial patellar plica (MPP) syndrome showed thickened MPP (arrow) and impingement MPP (asterisk) between medial femoral condyle and patella. On MRI, the PPTA was 138.2°. (c, d) A 22-year-old man with chondromalacia patella showed contour defects in the cartilage surface of patella medial facet (arrow) and there was 1.5 ⅹ 1.5 cm sized cartilage defect (asterisk) in that area on arthroscopy. The PPTA was 138.0° in this patient. (e, f) A 21-year-old man with infrapatellar fat pad (IPFP) syndrome showed soft tissue infiltrations (arrows) at IPFP on MRI and fat tissue hypertrophy (asterisk) on arthroscopy. The PPTA was 137.8°.