PMC9897692_01
Computed tomography scan, axial section showing a huge mass in the right anterior pararenal space, abutting inferior vena cava
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FIG1
No fat or calcification was noted within the lesion (Figure 1).
PMC9897692_02
Postoperative specimen showing the lobulated retroperitoneal mass with congested blood vessels
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FIG2
The outer surface of the mass was smooth and well-encapsulated with congested blood vessels (Figure 2).
Photomicrograph showing the presence of spindle cells displaying moderate pleomorphism in the form of vesicular chromatin, prominent nucleoli, and a few interspersed multinucleate giant cells (Hematoxylin and Eosin 100x resolution)
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FIG3
These spindle cells are large, with a severe pleomorphic nucleus, vesicular chromatin, prominent nucleoli, and a moderate amount of cytoplasm, in an abundant collagenous stroma (Figure 3 and Figure 4).
Photomicrograph showing extensive collagenization (Hematoxylin and Eosin 100x resolution)
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FIG4
These spindle cells are large, with a severe pleomorphic nucleus, vesicular chromatin, prominent nucleoli, and a moderate amount of cytoplasm, in an abundant collagenous stroma (Figure 3 and Figure 4).
Vimentin stained section showing membranous and cytoplasmic positivity in tumor cells
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FIG5
PMC9897692_03