Interstitial nephritis

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Overview

Historical Perspective

Classification

Pathophysiology

Causes

Differentiating Interstitial nephritis from other Diseases

Epidemiology and Demographics

Risk Factors

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Natural History, Complications and Prognosis

Diagnosis

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Case #1

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Mohsen Basiri M.D.

Synonyms and keywords: Tubulo-interstitial nephritis

Overview

Two main diseases involve the renal tubules are: Acute tubular necrosis due to Ischemic or toxic injury for more about ATN click here; and tubulointerstitial nephritis with Inflammatory involvement of tubules and interstitium and its consequent reactions.

Since some cases of TIN are due  to bacterial infection, and the renal pelvis is deeply involved, therefore pyelonephritis is term describes this condition; and In general ,the term interstitial nephritis is used for TIN that are owing to  nonbacterial causes of tubular injury such as  drugs, viral infections,autoimmune systemic diseases in which these condition mechanism of damage is due to inflammatory responses not direct damage.

Historical Perspective

  • In 1938, Councilman was the first to discover the association between systemic infections and the development of TIN; in autopsy kidneys of children dying of diphtheria and scarlet fever.
  • He described the findings as: cellular and fluid exudation in the interstitial tissue of kidneys, before the era of antibiotics.
  • The widespread introduction of percutaneous renal biopsy led to the discovery of similar findings in association with drug-related renal failure, in particular related to the use of penicillins and sulphonamides. Histological examination in ATIN reveals an infiltrate, which is largely composed of T cells, together with some macrophages and plasma cells. As there is some evidence for cutaneous delayed-type hypersensitivity and positive in vitrolymphocyte stimulation tests in response to suspected drugs, the etiology is presumed to be immune-mediated [2]. This is illustrated by the rapid recrudescence of disease upon inadvertent rechallenge in drug-related ATIN, a clear manifestation of an immunological memory response [3–5].

Classification

There is no established system for the classification of TIN, however according to clinical manifestations and the  inflammatory process, TIN, in spite of the etiologic agent, can be divided into acute and chronic categories.

Pathophysiology

Causes

Differentiating Interstitial nephritis from other Diseases

Epidemiology and Demographics

Risk Factors

Natural History, Complications and Prognosis

Diagnosis

History and Symptoms | Physical Examination | Laboratory Findings | KUB X Ray | CT | MRI | Biopsy and Ultrasound | Other Imaging Findings | Other Diagnostic Studies

Treatment

Medical Therapy | Primary Prevention | Secondary Prevention | Cost-Effectiveness of Therapy | Future or Investigational Therapies

Case Studies

Case #1

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