PMC6311866_01
Demonstrated cystic mass at the right thigh: (a) front view, (b) medial view, (c) lateral view, and (d) outline of the mass overlying the femoral vessels.
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fig1
Physical examination revealed a firm nonpulsatile mass over the right thigh measuring ~8 x 6 cm. in diameter (Figure 1).
MRI shown cystic lesion: (a) axial view, (b) coronal view, and (c) sagittal view.
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The right common femoral artery and vein and superficial artery and vein were displaced posteriorly (Figure 2).
Complete surgical removal of cyst.
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fig3
Complete cystic removal with femoral artery preservation was successful with minimal leakage of cyst wall (Figure 3).
Cystic content showed the clear, yellow fluid.
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Cystic content had shown the clear, yellow fluid (Figure 4).
(a, b) H&E staining showed that the cystic wall is lined by a single layer of flat lining cells.
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fig5
Microscopic examination was demonstrated as Figure 5. The cell lining was histologically supposed to be derived from endothelium or mesothelium by routine H&E staining (Figures 5(a) and 5(b)).
The cystic lining cells showed immunoreactive with CD31.
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Immunohistochemical studies revealed the cell lining of the cyst was positive for CD34, CD31 (Figure 6), and D2-40 (Figure 7) and negative for calretinin.
Immunohistochemical study revealed that the flattened cystic lining cells are positive for D2-40.
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fig7
Immunohistochemical studies revealed the cell lining of the cyst was positive for CD34, CD31 (Figure 6), and D2-40 (Figure 7) and negative for calretinin.