Case 2: Diagnostic Testing

Take a look at some initial diagnostic testing below.
Urinalysis/microscopy, urine electrolytes
Urine sediment
Basic labs
Kidney Ultrasound

Basic Lab Ref

Has your differential diagnosis changed? Choose your top 3 before moving on to additional testing!
Post-infectious glomerulonephritis (PIGN)
Membranous nephropathy
Diabetic nephropathy
Acute interstitial nephritis (AIN)
Systemic lupus erythematosus (SLE) nephritis
Anti-glomerular basement membrane (GBM) disease
Acute tubular necrosis (ATN)
IgA nephropathy
Hypovolemia
Some additional tests are now ready for you:
Complement levels (C3, C4)
C3 98 mg/dL (ref: 90 – 180 mg/dL); C4 22 mg/dL (ref: 10 – 40 mg/dL)
Urine eosinophils (Hansel stain)
Negative
Anti-neutrophil cytoplasmic antibody (ANCA) screen
Negative
Hepatitis C Antibody
Negative
Anti-Streptolysin O (ASO) Antibody
Negative

Click here when you’re ready for perform the biopsy!

Case 2 Index
Case 2 Introduction
Case 2 Physical Exam