Neonatal knee septic arthritis

Case contributed by Dr Maulik S Patel


Swelling of the left knee on examination. Overnight development of knee swelling. Lab - high WBC count, high CRP.

Patient Data

Age: 13 days
Gender: Male

Metaphyseal lucent bands are noted (normal in neonates) on the frontal projection. Soft tissue swelling around the left knee. 


Suprapatellar complex effusion with peripheral vascularity. The collection is compressible (demonstrated in the 3rd image).

Case Discussion

Surgery the next day proved septic arthritis but without evidence of osteomyelitis.

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Case information

rID: 13358
Published: 2nd Apr 2011
Last edited: 16th Apr 2020
Inclusion in quiz mode: Included