Figure 1139

Fanconi's syndrome in a patient with \ light chain proteinuria. A, Vacuolization of proximal tubular epithelial cells. Vacuoles contain light-brown-colored material.

B, Immunofluorescence. The granular material in tubular cells is stained for \ light chains.

C, Low-power view of a proximal tubular epithelial cell with vacuoles containing organized or crystalline material. D, High-power view of the vacuoles containing tubular or ladderlike crystalline structures. BB—brush border. (Panel A, methenamine silver. Original magnification X600, X400, X7000, X 19,000, respectively.)

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