A 27-year-old Chinese man comes to the clinic because of gross hematuria. The patient has a long history of recurrent hematuria, made worse by pharyngitis. He denies arthralgia, fever, chills or skin rash. There is no family history of kidney disease or hematuria. His temperature is 37 C (98.6 F) and his blood pressure is 120/70 mm Hg. His throat and lungs are clear, his abdomen is soft and non tender. There is no edema, rash or arthritis. His blood urea nitrogen is 10mg/dL, and his creatinine is 0.8mg/dL. Aurine specimen shows 15-20 dysmorphicred blood cells/ hpf, there is +2 protein and 1 RBC cast. Which of the following is the most likely diagnosis?
A. Alport syndrome
B. Goodpasture syndrome
C. IgA nephropathy
D. Nil disease
E. Wegener granulomatosis
A. Alport syndrome
B. Goodpasture syndrome
C. IgA nephropathy
D. Nil disease
E. Wegener granulomatosis