Renal
Vascular: HUS, ischemia, malignant HTN, thromboembolism, dissection
Infection: pyelonephritis, TB, post-strep GN
Trauma: renal trauma
Autoimmune: SLE, HSP, primary GNs, vasculitis
Neoplastic: renal tumours, lymphoma, myeloma
Drugs: NSAIDs, contrast, aminoglycosides, BLAST
(barbituates, lithium, alcohol, salicyaltes, theophylline)
Haematological: TTP