Related Experiment Video
Updated: May 24, 2025

Recurrent Escherichia coli Urinary Tract Infection Triggered by Gardnerella vaginalis Bladder Exposure in Mice
Published on: December 4, 2020
[A Rare Case of an Epidermoid Cyst Originating from the Upper Urinary Tract]
Haruna Ide1, Yuji Sakano1, Kenichi Kamiya2
1The Department of Urology, Higashi-Ohmi General Medical Center (The Department of Comprehensive Surgery, Shiga Medical University).
Abstract:
Epidermoid cysts originating from the upper urinary tract are extremely rare, and only five cases have been reported previously. We report a rare case of epidermoid cyst that originated from the right ureter : A 76-year-old man presented with asymptomatic gross hematuria. Computed tomography showed a right ureteral tumor (14×8 mm in size). Retrograde pyelography showed a defect (14 mm diameter) of the contrast medium in the same region. Urinary cytological examination indicated class III. A ureteral tumor was clinically indicated, and retroperitoneoscopic-assisted radical nephroureterectomy was performed. Postoperative histopathological examination of the resected specimen showed ureteral epidermoid cysts without any malignancy.
Related Concept Videos
Disorders of the Urinary System
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...
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...
Anatomy of Respiratory System I: Upper Respiratory Tract
Nose and nasal cavity
The nose and nasal cavity represent the main external openings of the respiratory tract....
Accessory Structures of the Skin: Sebaceous Glands
These glands that produce the oils on the skin and hair are holocrine glands. The mature...
Cranial Bones: Lateral View
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
Classification of Epithelial Tissues: Stratified Epithelium

