CASE 94 (December 2013)
The patient is a 8-year-old male with a three years history of intermittent gross hematuria, with multiple episodes over the last year, some of them associated to upper respiratory tract infections. The hematuria episodes resolved spontaneously within several days. Laboratory tests have been done over the last years and renal function has been normal, with creatinine around 0,5 mg/dL. Multiple urinalyses have shown varying degrees of hematuria and negative or traces (1+) of proteinuria. He has normal renal ultrasounds, as well as a normal intravenous pyelogram.
The patient has not had grown alterations in the growth and developmnent. The rest of the review of system is negative.
A renal biopsy was undertaken.
Case prepared by Dr. Carlos Andrés Jiménez.
Figure 1. H&E, X100.
Figure 2. H&E, X200.
Figure 3. H&E, X100.
Figure 4. H&E, X400.
Figure 5. H&E, X400.
Figure 6. H&E, X400.
Figure 7. Electron micrograph, X6,000.
Figure 8. Electron micrograph, X6,000.
Direct immunofluorescence for IgA, IgG, IgM, C3 and C1q: negative.
What is your diagnosis?