AIN
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Causes- pyelonephritis
- interstitial nephritis
- hypersensitivity tubulointerstitial nephritis
- granulomatous tubulointerstitial nephritis
- megalocytic interstitial nephritis
- malacoplakia
Histology- mononuclear infiltrate
- can have eosinophils
- can infiltrate tubules (tubulitis)
- edema
- etiology patterns
- rejection: vasculitis
- allergy: granuloma
- sarcoidosis: granuloma
- viral: inclusions
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