Interstitial nephritis natural history, complications and prognosis: Difference between revisions

Revision as of 23:19, 19 July 2018

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

Overview

In the majority of patients with TIN, recovery of function has been observed, and improvement immediately occurs upon stopping the offensive agent.

Nevertheless, about 12% of patients may progress to develop ESRD and its complications; and thus require dialysis or transplantation.

Natural History, Complications, and Prognosis

Natural History

The symptoms of (disease name) usually develop in the first/ second/ third decade of life, and start with symptoms such as ___.
The symptoms of (disease name) typically develop ___ years after exposure to ___.
If left untreated, [#]% of patients with [disease name] may progress to develop [manifestation 1], [manifestation 2], and [manifestation 3].

Complications

Common complications of TIN include:
- Hypertension
- Electrolyte and acid-base disorders
- ESRD

Prognosis

In the majority of patients with TIN, a full recovery or partial recovery occurs upon stopping the offensive agent. Meanwhileabout 12% of patients may progress to develop ESRD and its complications; and thus require dialysis or transplantation.

it has been suggested previously that the long-term outcome is worse if renal failure lasts for >3 weeks [10,13];

Two series have shown worse prognosis with increasing age [10,28],

Attempts have also been made to gain prognostic information from the renal biopsy. Only the degree of tubular atrophy predicted renal outcome in our series.

Some authors have reported that patchy cellular infiltration predicts a better outcome than diffuse disease [13,28]. However, recent studies have not supported a correlation between the degree of cellular infiltration or tubulitis and outcome [15,29]. The degree of interstitial fibrosis has been correlated to outcome [29,30], but in other studies there is no such relationship [31]. These conflicting observations may be due to the patchy nature of the disease and the random sampling on renal biopsy. The infiltrate is generally most prominent at the corticomedullary boundary, and the medulla is relatively spared [32].

In chronic tubulointerstitial nephritis the most serious long term effect is kidney failure. When the proximal tubule is injured sodium, potassium, bicarbonate, uric acid, and phosphate intake may be reduced or changed, resulting in metabolic acidosis, hypokalemia, hypouricemia, hypophosphatemia). Damage to the distal renal tubule may cause loss of urine concentrating ability and polyuria.

References

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@@ Line 16: / Line 16: @@
 === Complications ===
-* Common complications of [disease name] include:
+* Common complications of TIN include:
-** [Complication 1]
+** Hypertension
-** [Complication 2]
+** Electrolyte and acid-base disorders
-** [Complication 3]
+** ESRD
 ==Prognosis==
-The kidneys are the only body system that is directly affected by tubulointerstitial nephritis.  Kidney function is usually reduced; the kidneys can be just slightly dysfunctional, or fail completely.
+In the majority of patients with TIN, a full recovery or partial recovery occurs  upon stopping the offensive agent. Meanwhileabout 12% of patients may progress to develop ESRD and its complications; and thus require dialysis or transplantation.
-In chronic tubulointerstitial nephritis the most serious long term effect is [[kidney failure]].  When the proximal tubule is injured sodium, potassium, bicarbonate, uric acid, and phosphate intake may be reduced or changed, resulting in low bicarbonate, known as  [[metabolic acidosis]], [[hypokalemia]], low uric acid ([[hypouricemia]], and low phosphate ([[hypophosphatemia]]).  Damage to the distal renal tubule may cause loss of urine concentrating ability and [[polyuria]].
+it has been suggested previously that the long-term outcome is worse if renal failure lasts for >3 weeks [10,13];
+Two series have shown worse prognosis with increasing age [10,28],
+Attempts have also been made to gain prognostic information from the renal biopsy. Only the degree of tubular atrophy predicted renal outcome in our series.
+Some authors have reported that patchy cellular infiltration predicts a better outcome than diffuse disease [13,28]. However, recent studies have not supported a correlation between the degree of cellular infiltration or tubulitis and outcome [15,29]. The degree of interstitial fibrosis has been correlated to outcome [29,30], but in other studies there is no such relationship [31]. These conflicting observations may be due to the patchy nature of the disease and the random sampling on renal biopsy. The infiltrate is generally most prominent at the corticomedullary boundary, and the medulla is relatively spared [32].
+In chronic tubulointerstitial nephritis the most serious long term effect is [[kidney failure]].  When the proximal tubule is injured sodium, potassium, bicarbonate, uric acid, and phosphate intake may be reduced or changed, resulting in  [[metabolic acidosis]], [[hypokalemia]], [[hypouricemia]], [[hypophosphatemia]]).  Damage to the distal renal tubule may cause loss of urine concentrating ability and [[polyuria]].
-In most cases of acute tubulointerstitial nephritis, the function of the kidneys will return after the harmful drug is not taken anymore, or when the underlying disease is cured by treatment.  If the illness is caused by an allergic reaction, a corticosteroid may speed the recovery kidney function, however this is often not the case.  Chronic tubulointerstitial nephritis has no cure.  Some patients may require [[dialysis]].  Eventually, a kidney transplant may be needed.
 ==References==
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