Part A: Clinical information
Gender, Age
Male, 27 years old
Previous illnesses
None
Time period since the onset of the first symptoms
Relatively short: patient presented with a combination of malaise and arthralgia to his general physician and a rapidly progressive AKI was soon detected after which the patient was referred to a nephrologist.
Presentation
Combination of arthralgia, urticaria, slight temperature elevation and rapidly progressive AKI.
Laboratory parameters
Proteinuria: 1.0 grams
Positive urine sediment, erythrocyturia
ANCA, anti-GBM, anti-ds DNA negative.
Why was the decision made for a biopsy?
AKI of unknown cause.
How long after the first symptoms was the biopsy conducted?
Approximately 1 month.
Suspected diagnosis of the indication for biopsy?
The clinical question was: explanation for renal insufficiency?
Note related to annotations: To avoid obscuring the lesions, the annotations are deliberately positioned close to, but not directly over, the lesion areas.