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Meniscal Cruciate Anatomy
INTRAARTICULAR
Simple Meniscal Tears
Complex Meniscal Tears
Anterior Cruciate
Posterior Cruciate
Post Op Knee
EXTRAARTICULAR
Medial/Posteromedial
Lateral/Posterolateral
ANTERIOR KNEE
Patella
Patellar Tendon
Quadriceps Tendon
Dysplasia
Patellar Dislocation
Anterior DDx
CARTILAGE & BONE
ICRS
Trauma
OCD
Miscellaneous
MASSES
Hoffas Fat Pad
PVNS
SOC
Syn Hemangioma
THE PATELLA
Apart from trauma and cartilage disease, disorders of the patella are uncommon.
Variants include :
      • bipartite patella
      • Dorsal patellar defect.

Other lesions include:
      • Gout. Consider with any cytis type lesion affecting the bone and tendon attachments
      • Infection
      •Pagets Disease: becoming less common
      • Chondroblastoma . Most common bone tumour

See also here