1. Etiology of Knee Pain

2. Prevalence USA: 13% [Cunningham LS, et al. 1984]
UK: 35.2% [Arden NK, et al. 2006]
Australia: 48% [Zliai G, et al. 2006]
China: 13.6% [Zeng QY, et al. 2006]

3. Anatomy The joint consist of 3 compartment: Joint Lines:
Medial Tibiofemoral
Lateral Tibiofemoral
Patellofemoral
Joint Lines:
Femoral condyles
Tibial Plateaus

4. Anatomy
Meniscal Cartilage :
Medial
Lateral

5. Anatomy
Ligaments:
Ant & Post Cruciate
Med & Latt Collateral

6. Anatomy
Bursa:
Prepattelar
Inferapattelar
Anserin
Tendons
Muscles

7. Etiology of Knee Pain meniscal or ligamentous injury or fracture
Patellar malalignment or dysfunction
Cartilage loss due to osteoarthritis or synovitis
Periarticular bursitis or tendonitis
Referred pain from the hip, femur, or spine
Inflammatory arthritides (synovitis)

8. Pattern of Knee Pain Medial (the most common) Anterior
Popliteal (Posterior)
Lateral

9. Etiology of Medial Knee Pain
medial compartment osteoarthritis
bursitis
medial collateral ligament strain
(the most frequently injured ligament)
medial meniscal tear

10. bursitis
anserine
the most frequently inflamed bursa & the bursa adjacent to the medical collateral ligament

11. Etiology of Medial joint line pain
osteoarthritis
medial collateral ligament injuries
medial meniscal tears
fractures of the tibial plateau
Medial tibial plateau pain :
anserine bursitis

12. Etiology of Anterior Knee Pain
acute prepatellar bursitis
swelling and inflammatory change anterior to the patella

13. Etiology of Anterior Knee Pain
patellar tendonitis or jumper's knee
Focal at the inferior pole of the patella

14. Etiology of Anterior Knee Pain
Osgood Schlatter disease
Focal at the tibial tubercle

15. Etiology of Anterior Knee Pain
inflammatory arthritis (RA, gout & pseudogout)
[Diffuse + swelling and inflammatory change ]
septic arthritis
patellofemoral syndrome (Bilateral )
advanced osteoarthritis (Bilateral )
large knee effusions & injury to the quadriceps
Plicae

16. Etiology of Popliteal Knee Pain
Post Cruciate trauma
Post Capsular trauma
Tibial Neuritis
Baker's cyst
Synovitis
Meniscal abnormalities
Inflamation of any of post tendons

17. Etiology of Lateral Knee Pain & Lateral joint line pain
Lateral compartment osteoarthritis
injuries to the lateral collateral ligament
lateral meniscal tears

18. Etiology of Lateral Knee Pain
Iliotibial Band Friction Syndrome or Runner's knee
Pain on the outer side of the knee