A 49-year-old man with severe rheumatoid arthritis managed with gold salts comes to the physician for a 2-week history of peripheral edema. He immigrated to the US from India one month ago. Urinalysis shows 4+ protein and 1-2 RBC/hpf. Which of the following is the most likely diagnosis?
Alport syndrome
IgA nephropathy
Interstitial nephritis
Membranoproliferative glomerulonephritis
Membranous glomerulonephropathy
