PMC4421886_01
23-year old male with swelling and pain in his knee which was subsequently diagnosed as synovial hemangioma. Sagittal T1 weighted spin echo (SE) image shows hypointense intra-articular nodular soft tissue mass filling medial suprapatellar bursa, extending into the vastus medialis (arrow).
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F1
T1 and axial proton density fat suppression magnetic resonance images [Figure 1] and coronal proton density fat suppression sequences [Figure 2] showed the mass exhibiting a heterogeneous signal and containing fibrous septa and irregular margins.
23-year old male with swelling and pain in his knee which was subsequently diagnosed as synovial hemangioma. Coronal proton density fat-suppressed image shows the mass lesion with heterogeneous signal containing fibrous septa and irregular margin (arrow).
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F2
T1 and axial proton density fat suppression magnetic resonance images [Figure 1] and coronal proton density fat suppression sequences [Figure 2] showed the mass exhibiting a heterogeneous signal and containing fibrous septa and irregular margins.
23-year old male with swelling and pain in his knee which was subsequently diagnosed as synovial hemangioma. (a) Axial T1 SE and (b) coronal T1 fat-suppressed images show diffuse contrast enhancement (arrow).
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F3
The lesion was hypointense on T1-weighted sequences and hyperintense on proton density fat suppression; after injection of contrast material, the mass showed diffuse contrast enhancement [Figure 3]. There was no pathological appearance in adjacent bone structures.
23-year old male with swelling and pain in his knee which was subsequently diagnosed as synovial hemangioma. Biopsy tissue stained with hematoxylin and eosin x100 shows hemangioma in the arthroscopic biopsy (arrow).
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F4
Diagnosis of hemangioma was confirmed on histopathologic examination of the arthroscopic biopsy sample [Figure 4].