case_images: PMC9726840_01
case_images: Non-blanchable erythematous macules and palpable purpura on patient's leg(s).
case_images: 10.1177_2050313X221140648-fig1.jpg
case_images: PMC9726840_01_10.1177_2050313X221140648-fig1.jpg
case_images: fig1-2050313X221140648
case_images: A 71-year-old woman who had previously been diagnosed with rheumatoid arthritis presented with generalized edema, worsening hypertension, and non-blanchable erythematous papules with reticulation on both legs, which had been presented for 4 months, as shown in Figure 1.
case_images: Kidney biopsy pathology. Light microscopic examination stained with hematoxylin and eosin (a; original magnification, x400) and periodic acid-Schiff (b; original magnification, x400). Immunofluorescence study of IgM (c; original magnification, x400), kappa (d; original magnification, x400), and lambda (e; original magnification, x400).
case_images: 10.1177_2050313X221140648-fig2.jpg
case_images: PMC9726840_01_10.1177_2050313X221140648-fig2.jpg
case_images: fig2-2050313X221140648
case_images: A percutaneous kidney biopsy was performed and kidney pathology is shown in Figures 2 and 3.
case_images: Electron microscopic examination of kidney pathology showing electron-dense deposits in the capillary loop (a; bar = 2 mum). Higher magnification of electron-dense deposits showing organized structures (b; bar = 500 nm).
case_images: 10.1177_2050313X221140648-fig3.jpg
case_images: PMC9726840_01_10.1177_2050313X221140648-fig3.jpg
case_images: fig3-2050313X221140648
case_images: A percutaneous kidney biopsy was performed and kidney pathology is shown in Figures 2 and 3. Figure 3 displays the results of an electron microscopic (EM) study, which revealed the deposition of organized electron-dense materials at the mesangium and subendothelium.