Inclusion Criteria:  Eligible for APM Acceptance of infiltration procedure or APM Patient age above 30 years and under 65 years Acceptance of outpatient procedure Non-locked painful knee ≥ 1 month No osteoarthritis Kellgren-Lawrence ≤ 2 or Alhback ≤ 1 (Monopodal weh-ight-bearing AP and profile X-Ray with the knee in extension and bipedal schuss X-Ray with the knee at 45° of flexion No malignment > 5° (Full leg standing X-Ray) Pain when squatting Medial pain MRI confirmed unique horizontal degenerative medial lesion  Exclusion Criteria:  Traumatic meniscal injury Neurological or rheumatic inflammatory diseases MRI : Loose bodies or ligament injuries or osteochondral defects or tumors Previous ipsilateral knee surgery