What is the most definitive diagnostic tests for ATIN?
Definitive diagnosis is made by kidney biopsy. Because it is common practice to withdraw the suspected etiologic agent and carefully observe the kidney function in the ensuing days, kidney biopsies are not always performed in suspected cases of ATIN.
The most common indications for doing a kidney biopsy in suspected ATIN are as follows:
- • Unexplained AKI
- • Absence of improvement after withdrawal of suspected offending agent
- • Consideration of immunosuppression for treatment of suspected ATIN
