Presentation
Trauma after fall.
Patient Data
Age: 20 years
Gender: Female
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Right knee radiographs: small knee joint effusion. No fracture or malalignment. ("D" stands for "direito", which means "right" in Portuguese)
From the case:
Knee joint effusion
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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 a well-defined rounded homogeneous soft tissue density within the suprapatellar recess on a lateral radiograph.
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