Knee joint effusion

Case contributed by Dr Bruno Di Muzio


Trauma after fall.

Patient Data

Age: 21
Gender: Female

Right knee radiograph

Right knee radiographs: small knee joint effusion. No fracture or malalignment. ("D" stands for "direito", which means "right" in Portuguese)

Annotated image

Small knee joint effusion separating periarticular fat pads in >10 mm.

Case Discussion

Knee joint effusions are only reliably seen on lateral projections. A knee joint effusion appears as well-defined rounded homogeneous soft tissue density within the suprapatellar recess on a lateral radiograph. 

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Case information

rID: 37805
Published: 23rd Jun 2015
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

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