An Unusual Initial Presentation of Lupus Nephritis as a Renal Mass

Figure 1

Radiologic and pathologic presentation of the renal lesion. (a) CT scan image showing a homogeneous, enhancing left renal lesion. (b) Diffusion renal magnetic resonance imaging (MRI) image of the same left renal lesion. (c) Apparent diffusion coefficient (ADC) MRI image. (d) Light microscopy with periodic acid-Schiff staining showing a lymphocytic infiltration. (e) Granular positivity of C1q on the glomerular basement membrane by immunofluorescence. (f) Higher magnification of endocapillary hypercellularity. (g) Electronic microscopy showing subepithelial deposits on the glomerular basal membrane.

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