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Related Concept Videos

Nephrons01:10

Nephrons

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The kidneys are intricate organs with millions of working units known as nephrons. Each nephron features two major structures: the renal corpuscle, which facilitates blood plasma filtration, and the renal tubule, which handles the glomerular filtrate. Blood supply is directly linked to the nephrons. The renal corpuscle consists of the glomerulus, a capillary network, and the Bowman's capsule, a double-walled epithelial structure that encases the glomerulus. The filtering of blood plasma...
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Renal Tubule and Collecting Duct01:24

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The renal tubule is divided into three parts: the proximal convoluted tubule (PCT), the Loop of Henle (LOH), and the distal convoluted tubule (DCT).
Proximal Convoluted Tubule (PCT):
The PCT is the initial segment of the renal tubule, extending from the Bowman's capsule that encloses the glomerulus. Its convoluted structure and microvilli-lined cells increase the surface area for reabsorption. The PCT reabsorbs glucose, amino acids, sodium, and water from the filtrate, ensuring essential...
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Renal Corpuscle01:20

Renal Corpuscle

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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
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Nephrotic Syndrome I : Introduction01:24

Nephrotic Syndrome I : Introduction

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Nephrotic Syndrome is a chronic kidney disorder defined by clinical findings such as severe proteinuria, hypoalbuminemia, hyperlipidemia, and edema. These symptoms result from damage to the glomeruli, the kidney’s filtering units, increasing their permeability to proteins.Definition and Meaning:Proteinuria, defined as the loss of more than 3.5 grams of protein per day in adults, is a crucial feature of nephrotic syndrome. This condition is often accompanied by edema, the accumulation of...
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Acute Kidney Injury II: Pathophysiology01:29

Acute Kidney Injury II: Pathophysiology

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Acute kidney injury (AKI) causes are categorized into three primary categories based on the location of the injury: prerenal, intrarenal (or intrinsic), and postrenal causes. This classification guides clinical management and illustrates how different pathways can impair kidney function.Etiology and Pathophysiology of Acute Kidney Injury1. Prerenal causesEtiology: Prerenal Acute Kidney Injury, the most common type, occurs when reduced blood flow to the kidneys decreases filtration capacity...
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Formation of Dilute Urine01:20

Formation of Dilute Urine

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The formation of dilute urine is a critical renal adaptation that maintains fluid balance, particularly during periods of high fluid intake. This process primarily involves the juxtamedullary nephrons. By adjusting the permeability of water and ions in response to physiological conditions, the kidneys can either conserve or excrete water, resulting in concentrated or dilute urine.
Filtrate Osmolarity in the PCT
Initially, as the filtrate passes through the proximal convoluted tubule (PCT), its...
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Murine Bilateral Renal Lymphadenectomy
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Distal nephron neoplasms.

Stewart Fleming1

  • 1Department of Cellular and Molecular Pathology, University of Dundee, Ninewells Hospital, Dundee DD1 9SY, UK.

Seminars in Diagnostic Pathology
|March 26, 2015
PubMed
Summary
This summary is machine-generated.

Distal nephron tumours are rare and challenging to diagnose. Accurate identification is crucial for effective management, especially for aggressive subtypes that may respond to targeted therapies.

Keywords:
Chromophobe carcinomaCollecting duct carcinomaOncocytomaRenal carcinomaRenal medullary carcinomaTubulocystic carcinoma

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Area of Science:

  • Nephrology
  • Oncology
  • Pathology

Background:

  • Distal nephron tumours are uncommon and present diagnostic challenges.
  • Tumours can be classified by intercalated cell, principal cell, or unconfirmed distal nephron origin.
  • Distinguishing between oncocytomas, chromophobe carcinoma, and hybrid tumours is a common diagnostic dilemma.

Purpose of the Study:

  • To review the classification and diagnostic challenges of distal nephron tumours.
  • To highlight the importance of recognizing aggressive subtypes like collecting duct carcinoma and renal medullary carcinoma.
  • To discuss the potential for targeted therapy in managing these rare renal cancers.

Main Methods:

  • Review of existing literature on distal nephron tumours.
  • Analysis of histopathological features and classification systems.
  • Discussion of diagnostic criteria and differential diagnoses.

Main Results:

  • Distal nephron tumours encompass a spectrum of entities with varying prognoses.
  • Intercalated cell tumours (oncocytoma, chromophobe carcinoma, hybrid) pose significant diagnostic difficulties.
  • Collecting duct carcinoma and renal medullary carcinoma, though aggressive, show promise with targeted therapies.

Conclusions:

  • Accurate histopathological diagnosis of distal nephron tumours is essential for patient management.
  • Further research is needed to clarify the phenotype of tubulocystic carcinoma and mucinous tubular and spindle cell carcinoma.
  • Recognition of specific tumour types is critical for guiding treatment decisions, particularly for aggressive renal cancers.