['osteoarthritis']
['hyaluronic acid']

        Inclusion Criteria:

          -  Symptomatic Knee OA, Kellgren and Lawrence grade I, II, III on plain Rx films.

          -  Chondromalacia patella grade I-III on knee MRI. With or without meniscal tear.

          -  Stable knee and normal clinical exam of involved extremity

          -  Written informed consent for patients.

        Exclusion Criteria:

          -  Bilateral symptomatic knee OA

          -  Local or systemic infection.

          -  Active neoplasia or immunosuppressive state

          -  Pregnancy or Breastfeeding

          -  Body Mass Index ≥ 30

          -  Presence of Pacemaker or Lower extremity metal implant

          -  Anticoagulant treatment other than aspirin.

          -  Recent use of oral (previous month) or intra-articular (previous 3 months)
             corticosteroids

          -  Concomitant inflammatory joint disease (cristal, connective tissue disease)

          -  Valgus (>10o) or Varus (>5o) deformity of involved extremity

          -  Condilar or Tibial plateau Generalized Bone Marrow edema on MRI

          -  Significant symptomatic hip or spine disease

          -  Significant abnormality in baseline lab tests
      