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Related Concept Videos

Urinary Bladder01:23

Urinary Bladder

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The urinary bladder is a hollow, muscular sac that temporarily stores urine before it is expelled from the body. It can hold approximately 600 mL of urine prior to micturition. The bladder is retroperitoneal and located behind the pubic symphysis in the pelvic floor.
In males, the bladder is situated in front of the rectum, while in females, it is positioned anterior to the vagina and uterus. The bladder floor contains an inverted triangular area called the trigone, defined by the two ureteric...
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Introduction to Urinary System01:13

Introduction to Urinary System

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The urinary system consists of two kidneys, two ureters, the urinary bladder, and the urethra.
The kidneys are bean-shaped organs located in the retroperitoneal space, on either side of the vertebral column, between the T12 and L3 vertebrae. They are partially protected by the rib cage and surrounded by perirenal fat, which provides cushioning. They are responsible for urine formation and play critical roles in regulating blood pressure, electrolyte levels, and hormone production. The ureters...
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Disorders of the Urinary System01:20

Disorders of the Urinary System

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The urinary system is responsible for eliminating waste and excess fluids from the body. However, disorders of the urinary system can arise due to various reasons like infections, stress, age, congenital abnormalities, and lifestyle.
Urinary tract infections (UTIs) are one of the most common urinary system disorders. They are caused by bacteria that enter the urethra and can spread to the bladder resulting in cystitis. Pyelonephritis is the result of a UTI that has ascended to the level of the...
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Atomic Mass01:52

Atomic Mass

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Atoms — and the protons, neutrons, and electrons that compose them — are extremely small. For example, a carbon atom weighs less than 2 × 10−23 g. When describing the properties of tiny objects such as atoms, we use appropriately small units of measure, such as the atomic mass unit (amu). The amu was originally defined based on hydrogen, the lightest element, then later in terms of oxygen. Since 1961, it has been defined with regard to the most abundant isotope of carbon, atoms of which...
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Molar Mass01:54

Molar Mass

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The identity of a substance is defined not only by the types of atoms or ions it contains but by the quantity of each type of atom or ion. For example, water, H2O, and hydrogen peroxide, H2O2, are alike in that their respective molecules are composed of hydrogen and oxygen atoms. However, because a hydrogen peroxide molecule contains two oxygen atoms, as opposed to the water molecule, which has only one, the two substances exhibit very different properties.
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Anatomy of the Genitourinary System II: Bladder and Urethra01:19

Anatomy of the Genitourinary System II: Bladder and Urethra

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The lower urinary system consists of the urinary bladder and urethra, which are essential in storing and expelling urine from the body. Together with the internal and external sphincters, these structures work together to regulate urination effectively.Anatomy of the BladderThe urinary bladder is a muscular, stretchable organ behind the pubic bone and in front of the rectum. In females, the bladder is positioned anterior to the vagina and inferior to the uterus, while in males, it is located...
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Related Experiment Video

Updated: Feb 8, 2026

Urinary Bladder Distention Evoked Visceromotor Responses as a Model for Bladder Pain in Mice
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Urinary Bladder Distention Evoked Visceromotor Responses as a Model for Bladder Pain in Mice

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Hematoma in Urinary Bladder Masquerading as Neoplastic Mass.

Anurag Jain1, Abhishek Mahato1, Mattakarotu Joseph Jacob1

  • 1Department of Nuclear Medicine and PET CT, Army Hospital R And R, New Delhi, India.

Indian Journal of Nuclear Medicine : IJNM : the Official Journal of the Society of Nuclear Medicine, India
|July 3, 2018
PubMed
Summary

Pelvic irradiation for gynecological cancers can cause urinary bladder hematomas. Fluorodeoxyglucose Positron Emission Tomography Computed Tomography (FDG PET CT) imaging helped diagnose a non-neoplastic bladder mass.

Keywords:
Fluorodeoxyglucose positron emission tomography computed tomographyhematomaneoplastic massurinary bladder

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Area of Science:

  • Urology
  • Radiology
  • Oncology

Background:

  • Intraluminal urinary bladder hematoma is typically caused by trauma.
  • Pelvic irradiation in gynecological and pelvic malignancies can lead to urogenital complications, including bladder hematoma.
  • Small hematomas are detectable via ultrasound, but large ones can mimic neoplastic masses on imaging.

Purpose of the Study:

  • To present an interesting case of an intraluminal urinary bladder mass.
  • To highlight the utility of FDG PET CT in diagnosing non-neoplastic bladder masses.

Main Methods:

  • Case presentation of an intraluminal urinary bladder mass.
  • Diagnostic imaging using FDG PET CT.

Main Results:

  • FDG PET CT successfully identified the intraluminal urinary bladder mass as non-neoplastic.
  • The imaging modality differentiated the hematoma from a potential neoplastic mass.

Conclusions:

  • FDG PET CT is a valuable tool for diagnosing intraluminal urinary bladder masses, particularly when they mimic neoplastic lesions.
  • Understanding the potential complications of pelvic irradiation is crucial for accurate diagnosis.