A 12-year-old boy. In year X-1, a routine physical examination revealed proteinuria, but secondary testing showed no abnormalities. At a follow-up examination in June of year X, both proteinuria and occult hematuria were detected. Subsequent testing revealed hypocomplementemia, prompting a kidney biopsy in October of the same year.
Past Medical History: None
Medications: None
Family History: None
Vital parameters:
BP: 113/60 mmHg
HR: 74/min
SpO2: 100 %
Physical Examination:
Physical examination revealed no abnormalities.
Laboratory Findings
Urinalysis:
RBCs: 20–29/HPF, WBCs: 1–4/HPF, 24-hour urine protein: 1540 mg/day
Blood Tests:
WBC: 4,700/μL, Hb: 13.4 g/dL, Platelets: 239,000/μL, TP: 6.7 g/dL, Alb: 4.3 g/dL, BUN: 10.4 mg/dL, Cr: 0.65 mg/dL, eGFR: 85.1 mL/min/1.73 m², HbA1c:5.0%, CRP: 0.03 mg/dL, IgG: 1218 mg/dL, IgA: 154 mg/dL, IgM: 130 mg/dL, C3: 24 mg/dL, C4: 20 mg/dL, CH 50＜5U／ml ANA Titer: 1:40 c-ANCA : negative p-ANCA : negative.
Note related to annotations: To avoid obscuring the lesions, the annotations are deliberately positioned close to, but not directly over, the lesion areas.