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AJR Teaching File: Enlarging Splenic Mass After Nephrectomy

Alvin C. Silva1

1 Department of Diagnostic Radiology, Mayo Clinic Scottsdale, 13400 E Shea Blvd., Scottsdale, AZ 85259.


Figure 1
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  		Fig. 1A —Inflammatory pseudotumor of the spleen in asymptomatic 74-year-old man with history of remote renal carcinoma resection. Axial T1-weighted MR image shows that mass (arrow) is isointense to splenic parenchyma.

 

Figure 2
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  		Fig. 1B —Inflammatory pseudotumor of the spleen in asymptomatic 74-year-old man with history of remote renal carcinoma resection. Axial T2-weighted MR image with fat saturation shows well-defined mass (arrow) that is mildly hypointense to splenic parenchyma.

 

Figure 3
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  		Fig. 1C —Inflammatory pseudotumor of the spleen in asymptomatic 74-year-old man with history of remote renal carcinoma resection. Axial T2-weighted MR image after administration of superparamagnetic iron oxide (SPIO) contrast agent shows decreased signal involving liver and spleen. Because splenic mass (arrow) does not take up SPIO contrast material, it remains relatively increased in signal intensity.

 

Figure 4
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  		Fig. 1D —Inflammatory pseudotumor of the spleen in asymptomatic 74-year-old man with history of remote renal carcinoma resection. Dynamic gadolinium-enhanced images during arterial (D), portal venous (E), and delayed (F) phases show heterogeneous peripheral early enhancement (long arrows) and progressive central enhancement (short arrows) that remains mildly hyperintense on subsequent delayed phases.

 

Figure 5
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  		Fig. 1E —Inflammatory pseudotumor of the spleen in asymptomatic 74-year-old man with history of remote renal carcinoma resection. Dynamic gadolinium-enhanced images during arterial (D), portal venous (E), and delayed (F) phases show heterogeneous peripheral early enhancement (long arrows) and progressive central enhancement (short arrows) that remains mildly hyperintense on subsequent delayed phases.

 

Figure 6
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  		Fig. 1F —Inflammatory pseudotumor of the spleen in asymptomatic 74-year-old man with history of remote renal carcinoma resection. Dynamic gadolinium-enhanced images during arterial (D), portal venous (E), and delayed (F) phases show heterogeneous peripheral early enhancement (long arrows) and progressive central enhancement (short arrows) that remains mildly hyperintense on subsequent delayed phases.

 

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