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Related Concept Videos

Renal Corpuscle01:20

Renal Corpuscle

The glomerulus and Bowman's capsule are two essential components of the nephron, which is the functional unit of the kidney. These microscopic structures play a critical role in the process of blood filtration to produce urine.
Glomerulus: Structure and Function
The glomerulus is a tiny, intricate network of capillaries located at the beginning of the nephron. It's enveloped by the Bowman's capsule and receives its blood supply from an afferent arteriole, which divides into numerous capillaries...
Drug Dosing in Renal Diseases: Measurement of Glomerular Filtration Rate01:25

Drug Dosing in Renal Diseases: Measurement of Glomerular Filtration Rate

The glomerular filtration rate (GFR) is a critical indicator of kidney health, reflecting how well the kidneys filter blood. Changes in GFR can signal potential kidney impairment, necessitating accurate measurement methods to monitor kidney function effectively.Various molecules can serve as markers for GFR measurement, with the ideal marker meeting several specific criteria. It must freely filter at the glomerulus, avoid reabsorption or secretion by the renal tubules, remain unmetabolized, not...
Factors Affecting Renal Clearance: Renal Impairment01:17

Factors Affecting Renal Clearance: Renal Impairment

Renal dysfunction significantly impairs the renal clearance of drugs, leading to potential complications in drug therapy. Renal failure, which can be caused by various factors, poses a significant challenge in the elimination of drugs from the body.
One condition associated with renal failure is uremia. Uremia is characterized by impaired glomerular filtration and fluid accumulation in the body. This condition hinders the renal clearance of drugs, resulting in drug accumulation and potential...
Physiology of the Genitourinary System I: Renal Blood Flow and Glomerular Filtration01:29

Physiology of the Genitourinary System I: Renal Blood Flow and Glomerular Filtration

The kidneys are vital organs responsible for regulating blood filtration, waste excretion, and fluid balance, all of which are crucial for maintaining homeostasis. Renal physiology examines renal blood flow, glomerular filtration, and urine formation, ensuring the body’s internal environment remains stable.Renal Blood FlowThe kidneys receive about 20-25% of the cardiac output, typically around 1200 mL of blood per minute in an average adult. Blood flows into the kidneys through the renal...
Drug Dosing in Renal Diseases: Estimation of Glomerular Filtration Rate Based on Serum Creatinine Concentration01:28

Drug Dosing in Renal Diseases: Estimation of Glomerular Filtration Rate Based on Serum Creatinine Concentration

Glomerular filtration rate (GFR) can be estimated from serum creatinine using the modification of diet in renal disease (MDRD) formula or the chronic kidney disease–epidemiology collaboration (CKD–EPI) equation. Both methods are widely used in clinical practice to assess kidney function and guide treatment decisions.The MDRD equation does not require weight or height measurements and is normalized to the body surface area of 1.73 m², considered the average adult surface area. This equation is...
Anatomy of the Genitourinary System I: Kidneys and Ureters01:11

Anatomy of the Genitourinary System I: Kidneys and Ureters

The upper urinary system comprises two kidneys and two ureters, which are crucial in filtering blood and forming urine.KidneysLocation and Structure:The kidneys are two bean-shaped organs positioned behind the peritoneum on either side of the spine.Kidneys are between the 12th thoracic (T12) and the 3rd lumbar (L3) vertebrae.The position of the liver causes the right kidney to sit slightly lower than the left.Protective Layers:Each kidney is enveloped in a tough, fibrous membrane called the...

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Microfluidic Co-culture of Renal Healthy and Tumor Epithelium to Model Kidney Cancer Progression
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Grading systems in renal cell carcinoma.

Giacomo Novara1, Guido Martignoni, Walter Artibani

  • 1Department of Oncological and Surgical Sciences, Urology Clinic, University of Padua, Padua, Italy.

The Journal of Urology
|January 16, 2007
PubMed
Summary

Renal cell carcinoma (RCC) grading is crucial for prognosis. While the Fuhrman system is widely used, standardization is needed to improve reproducibility and consensus among pathologists for better patient outcomes.

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Area of Science:

  • Oncology
  • Pathology
  • Urology

Background:

  • Renal cell carcinoma (RCC) is a significant health concern.
  • Accurate grading of RCC is essential for predicting patient outcomes.
  • Existing grading systems face challenges in reproducibility and standardization.

Purpose of the Study:

  • To review updated literature on renal cell carcinoma grading systems.
  • To evaluate the prognostic value and limitations of current RCC grading methods.
  • To identify areas for improvement in RCC classification.

Main Methods:

  • A nonsystematic literature review was conducted.
  • Data were identified through a MEDLINE search using MeSH and free text protocols.
  • 184 relevant records were collected and analyzed.

Main Results:

  • Nuclear grade is a powerful independent predictor of cancer-specific survival in RCC.
  • The Fuhrman grading system is the most common method used globally.
  • Significant drawbacks include inter- and intra-observer variability and heterogeneity in survival probabilities stratified by grade.
  • Histological subtypes also play a role in prognosis.

Conclusions:

  • Grade remains a critical prognostic factor for renal cell carcinoma patients.
  • The Fuhrman grading system requires better standardization of nuclear criteria.
  • Achieving consensus among uropathologists is necessary to enhance grading accuracy and reproducibility.