PMC3919933_01
Arterial phase computed tomography. The tumor showed no clear enhancement in this phase.
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The tumor was well-circumscribed and protruding outside the renal contour, and no clear enhancement was identified in the arterial phase (Fig. 1).
Venous phase computed tomography. The tumor showed marginal uneven enhancement in this phase.
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However, marginal uneven enhancement was observed in the venous phase (Fig. 2).
Tumor was composed of small, elongated cords or tubules, in a tightly packed arrangement (hematoxylin and eosin; magnification, x10).
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The tumor was composed of small, elongated cords or tubules, in a tightly packed arrangement (Fig. 3).
Myxoid stroma was interspersed among the tubular cells (hematoxylin and eosin; magnification, x40).
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Myxoid stroma was shown to be interspersed among the tubular cells (Fig. 4), and appeared to exhibit slender tubular spindle cell-like structures (Fig. 5).
Tumor cells were smaller and cube-shaped or oval, with single small eosinophilic nucleoli and low-grade nuclei (hematoxylin and eosin; magnification, x40).
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Tumor cells were smaller and cubic-shaped or oval, with single small eosinophilic nucleoli and low-grade nuclei (Fig. 6).
Myxoid stromal staining by acidic mucus (alcian blue; magnification, x40).
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The myxoid stroma was stained by acidic mucus (Fig. 7).
CK7 showed positive expression in tumoral cells (magnification, x20).
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EMA showed positive expression in tumoral cells (magnification, x10).
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