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141491 Pathology

A 32-year-old man complains of recurrent hematuria since his youth. The hematuria typically occurs following upper respiratory tract infections. Vital signs are normal. Urinalysis shows proteinuria, hematuria, and a few red blood cell casts. Laboratory studies disclose normal levels of BUN and creatinine. The ANA and ANCA tests are negative. Which of the following is the most likely diagnosis?

AAmyloid nephropathy
BBerger disease (IgA nephropathy)
CHereditary nephritis (Alport syndrome)
DMembranous glomerulopathy
Pathology
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