Related Experiment Video
Updated: Mar 15, 2026

Recurrent Escherichia coli Urinary Tract Infection Triggered by Gardnerella vaginalis Bladder Exposure in Mice
Published on: December 4, 2020
[A Case of Emphysematous Cystitis with Bladder Diverticulum].
Shinya Kajiwara1, Hiroshi Matsuura2, Shigeki Arase2
1The Department of Urology, Nephro-Urologic Surgery and Andrology, Mie University Graduate School of Medicine.
Emphysematous cystitis (EC), a rare urinary tract infection, can occur with bladder diverticulum. This case highlights diabetes and urinary retention as potential contributing factors to EC development.
Area of Science:
- Urology
- Infectious Diseases
Background:
- Emphysematous cystitis (EC) is a severe, uncommon urinary tract infection characterized by gas in the bladder wall.
- Bladder diverticula are outpouchings of the bladder wall that can lead to incomplete emptying and urine stagnation.
Observation:
- A 77-year-old male with diabetes presented with hematuria and pneumaturia.
- Diagnosis of EC and a large bladder diverticulum was confirmed via CT scan and cystoscopy.
- The diverticulum caused significant residual urine, suggesting a neurogenic component.
Findings:
- Gas within the bladder wall and lumen confirmed EC.
- The large bladder diverticulum was identified as a key anatomical abnormality.
- Diabetes mellitus and urinary retention were considered primary risk factors for EC.
Implications:
- This case underscores the importance of identifying and managing bladder diverticula in patients with EC.
- Effective treatment involves bladder drainage and antibiotics, addressing underlying causes like urinary retention.
- Understanding risk factors such as diabetes and neurogenic bladder is crucial for preventing EC recurrence.
Related Concept Videos
Imaging Studies VI: Voiding Cystourethrography and Cystography
Urinary Bladder
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...
Urologic Endoscopic Procedure: Cystoscopic Examination
Anatomy of the Genitourinary System II: Bladder and Urethra
Urinary Tract Infection II: Pathophysiology
Acute Pyelonephritis II: Diagnostic Studies and Management

