From: Patellofemoral pain syndrome (PFPS): a systematic review of anatomy and potential risk factors
| Articular Cartilage Injury | Bone Tumors | Chondromalacia Patellae |
| Hoffa's Disease | Iliotibial (IT) Band Syndrome | Loose Bodies |
| Neuromas | Osgood-Schlatter Disease | Osteochondritis Dissecans |
| Patellar Instability/Subluxation | Patellar Stress Fracture | Patellar Tendinopathy |
| Patellofemoral Arthritis | Patellofemoral Pain Syndrome | Pes Anserine Bursitis |
| Plica Synovialis | Prepatellar Bursitis | Previous Surgery |
| Quadriceps Tendinopathy | Referred Pain from Lumbar Spine or Hip Joint Pathology | Saphenous Neuritis |
| Sinding-Larsen-Johansson Syndrome | Symptomatic Bipartite Patella |