Chondromalacia patellae

Case contributed by Dr Mostafa El-Feky

Presentation

Anterior right knee pain

Patient Data

Age: 20 years
Gender: Male

MRI right knee

MRI

A focal defect is noted at the patellar articular cartilage with minimal subchondral edematous bone changes (grade III chondromalacia patellae according to modified Outerbridge grading system).

Mild knee joint effusion is also noted.  

Case Discussion

Chondromalacia patella is focal degeneration of the articular patellar cartilage. It may be spontaneous or secondary to primary incidents like trauma. It is more common in females in the young adult age group. The usual presentation is anterior knee pain. MRI is the modality of choice for diagnosis and grading. According to modified Outerbridge grading system, these features represent grade III chondromalacia patella.

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