PMC3539348_01
Magnetic resonance images (T2-weighted) highlighting the prepatellar collection of fluid in sagittal (a) and axial (b) sections.
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fig1
A magnetic resonance image (MRI) was performed, which illustrated a large prepatellar swelling extending from the distal quadriceps expansion to the patellar tendon insertion over a craniocaudal dimension of 10 cm (Figures 1(a) and 1(b)).
Ultrasound appearance of fluid collection lying anterior to extensor mechanism of right knee.
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fig2
An ultrasound-guided aspiration was performed, which showed a large prepatellar seroma/bursa overlying the extensor mechanism (Figure 2). 18 mLs of serous fluid was aspirated and 25 mg of hydrocortisone acetate in lignocaine was subsequently injected.