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[The importance of the pathologist to the clinical decision in glomerular diseases]
Insights
Accurate diagnosis of glomerular diseases in adults requires morphologic examination. Clinical findings guide biopsy decisions, crucial for effective treatment of glomerulonephritis and rapidly progressive renal insufficiency.
Area of Science:
- Nephrology
- Pathology
- Medical Diagnostics
Context:
- Glomerular diseases in adults necessitate precise diagnosis for effective treatment.
- Current knowledge indicates limited successful treatments for many clinically diagnosed glomerulonephritides.
- Clinical presentation must inform the decision for or against a kidney biopsy.
Purpose:
- To outline the diagnostic criteria for glomerular diseases based on morphologic findings.
- To establish guidelines for kidney biopsy indications in adult patients with suspected glomerular disease.
- To emphasize the role of clinical staging in guiding diagnostic and therapeutic pathways.
Summary:
- Morphologic examination (light, immunofluorescence, electron microscopy) is essential for diagnosing glomerular diseases.
- Erythrocyte morphology and urinary protein electrophoresis aid in diagnosing glomerular disease.
- Clinical staging (acute, oligosymptomatic, chronic progressive) and specific syndromes (nephrotic, rapidly progressive renal insufficiency) dictate biopsy necessity.
Impact:
- Informed biopsy decisions can prevent disadvantages for patients where histologic evidence is not critical.
- Timely diagnosis and treatment, potentially aided by rapid pathologist findings, can improve outcomes for conditions like rapidly progressive renal insufficiency.
- Pathologist expertise is invaluable for classifying glomerulonephritides and guiding treatment, especially in atypical cases.
Abstract:
The indication to treatment of glomerular diseases in adults can only be based on the morphologic findings by light-, immunofluorescent- and electronmicroscopic examination. The majority of clinically diagnosed glomerulonephritides cannot be successfully treated according to current knowledge. Clinical findings, therefore, must help to decide where a biopsy should be performed or where one can do without histologic evidence without any disadvantage for the patient. The diagnosis of "glomerular disease" can be made by examination of erythrocyte morphology in the urine and from urinary protein pattern by poyacrylic-gel-electrophoreses. Having obtained this diagnosis, the indication for biopsy is possible, if a system of clinically defined stage is applied, as acute-, oligosymptomatic- and chronic progressive glomerulonephritis syndrome. A biopsy should be taken in any case of the nephrotic syndrome and urgently in the case of rapidly progressive renal insufficiency. Combined immunosuppressive treatment eventually in conjunction with plasmaphoresis has improved the prognosis of RPGN essentially and a biopsy should then be taken as soon as possible. It would be desirable, therefore, for the clinician if he could get the pathologists findings even on weekends or on holidays, to avoid any delay in starting the treatment. Special treatment regimes usually are chosen according to morphologically defined subgroups of glomerulonephritides. The valuable help of the pathologist in these normal cases becomes most evident, where a histologic finding can't be ascribed to any defined group and no evaluated treatment regimen is available. This is demonstrated by some clinical cases.