PMC3101732_01
Solid and gray-white mass with myxoid areas.
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F0001
In the second case, the lesion measured 15x10x8 cm and was solid and gray-white, and had myxoid areas (Figure 1).
Spindle-shaped cells having a fascicular and vaguely storiform pattern (hematoxylin and eosin, x10).
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F0002
Microscopic examination in both cases revealed well-circumscribed tumors composed of spindle-shaped, bland-looking cells having a fascicular and a vaguely storiform pattern (Figure 2).
Exceedingly myxoid stroma (hematoxylin and eosin, x40).
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F0003
In other areas there was extensive stromal hyalinization, with a paucity of neoplastic cells, and in yet others, the stroma was exceedingly myxoid (Figure 3), with widespread separation of the neoplastic cells.
Myxoid zones composed of bland spindled cells with delicate branching-to-curvilinear vessels (hematoxylin and eosin, x10).
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F0004
In the myxoid zones, the tumor was composed of bland spindled-to-stellate cells in a myxoid-to-lightly collagenized stromal background, often with associated curvilinear-to-branching prominent vasculature (Figure 4).
Spindled stroma punctuated by large collagen rosettes (hematoxylin and eosin, x10).
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F0005
The spindled stroma was punctuated by large collagen rosettes ringed by nuclei (Figure 5).
S-100 positivity in the rounded cells present in the cellular cuff of the giant rosettes (hematoxylin and eosin, x40).
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F0006
S-100 was frequently positive in the rounded cells (Figure 6).