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Imaging Studies I: Kidney, Ureter, and Bladder Studies01:28

Imaging Studies I: Kidney, Ureter, and Bladder Studies

Kidney, Ureter, and Bladder (KUB) StudiesKidney, Ureter, and Bladder (KUB) studies are standard diagnostic imaging procedures used to assess the anatomy of the urinary system. They are commonly utilized for patients experiencing abdominal pain or urinary symptoms. By using a simple X-ray of the abdomen, KUB studies can reveal structural and pathological abnormalities within the kidneys, ureters, and bladder. These studies are particularly valuable in diagnosing kidney stones, urinary...
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Renal Drug Clearance: Comparison Between Renal Excretion Methods

Renal clearance is a critical parameter encompassing kidney filtration, secretion, and reabsorption processes. It is calculated using a specific equation to determine the rate at which the kidneys clear a drug.
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External Anatomy of the Kidney

The kidneys are a pair of bean-shaped organs in the human body that play a critical role in maintaining overall health. They filter out waste products from the blood, regulate blood pressure, maintain electrolyte balance, and stimulate the production of red blood cells.
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Determination of Renal Drug Clearance: Graphical and Midpoint Methods

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French AFU Cancer Committee Guidelines - Update 2022-2024: management of kidney cancer.

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Related Experiment Video

Updated: May 23, 2026

In Vivo, Percutaneous, Needle Based, Optical Coherence Tomography of Renal Masses
09:31

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Published on: March 30, 2015

How to characterise a solid renal mass: a new classification proposal for a simplified approach.

O Hélénon1, D Eiss, P Debrito

  • 1Université Paris-Descartes, 15, rue de l'École-de-Médecine, 75270 Paris cedex 06, France. olivier.helenon@nck.aphp.fr

Diagnostic and Interventional Imaging
|April 6, 2012
PubMed
Summary

Computed tomography (CT) is standard for characterizing solid renal masses. MRI can replace CT for solid mass characterization, and CT can classify masses into four types after determining they are solid and vascular.

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Last Updated: May 23, 2026

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Published on: March 30, 2015

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Published on: March 27, 2018

Area of Science:

  • Radiology
  • Medical Imaging
  • Oncology

Background:

  • Computed tomography (CT) is the primary method for characterizing solid renal masses.
  • Magnetic resonance imaging (MRI) and ultrasound offer complementary information for masses with indeterminate cystic or solid nature on CT.
  • Differentiating renal masses is crucial for appropriate patient management and treatment strategies.

Purpose of the Study:

  • To evaluate the utility of CT and MRI in characterizing solid renal masses.
  • To propose a classification system for solid renal masses based on imaging features.
  • To establish imaging criteria for differentiating benign from potentially malignant renal lesions.

Main Methods:

  • Review of CT and MRI scans for solid renal masses.
  • Application of a proposed four-type classification system based on CT findings.
  • Correlation of imaging features with pathological diagnosis where available.

Main Results:

  • CT is the reference standard for solid renal mass characterization.
  • MRI can substitute CT for characterizing solid renal masses in most instances.
  • A proposed CT-based classification categorizes masses into: pseudotumoral dysmorphisms (type 1), high-fat angiomyolipomas (type 2), indeterminate tumors (type 3), and malignant tumors (type 4).

Conclusions:

  • CT is effective for classifying solid and vascular renal masses.
  • MRI serves as a valuable alternative to CT for solid mass characterization.
  • The proposed CT classification aids in differentiating benign from potentially malignant renal masses.