PMC4891626_01
Sagittal T1-weighted MR image shows a lobulated mass within the suprapatellar recess that is predominantly isointense to muscle with scattered tiny areas of fat. [Powerpoint Slide]
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Magnetic resonance imaging (MRI) shows a suprapatellar mass demonstrating heterogenous signal with enhancement following intravenously administered gadolinium (Figure 1A, Figure 1B, Figure 1C).
Sagittal fat-suppressed T2-weighted MR image shows a heterogenous mass demonstrating areas of both low and high signal intensities. Note the presence of a small amount of joint fluid (arrows). [Powerpoint Slide]
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The histopathologic evaluation in our case revealed a cavernous hemangioma pattern, with large, thin-walled vessels (Figure 2A, Figure 2B).