Urinary Bladder Herniation

URINARY BLADDER HERNIATION

Herniation of the Urinary Bladder into the inguinal canal or femoral hernia was first describe by Plater in 1550.
Incidence of UB hernia in Inguinal hernia is ~ 1-3% (rare).

Has been divided into 3 types :

1. Paraperitoneal : Most frequent.UB remains extraperitoneal and remains medial to the peritoneal herniation.
2. Intraperitoneal : UB hernia is completely covered by the peritnoeal sac.
3. Extraperitoneal: UB alone herniates, with no peritoneal herniation.

Herniation of Bladder diverticulum is also described.

But the difference between Bladder Hernia and Diverticulum is that, bladder hernia contains all the components of Bladder wall.
Diverticulum is only an outpouching of the mucosa through the defect in muscular layer (Detrusor).

Cystocele is a midline projection of bladder, whereas Bladder Hernia is more lateral.

Bladder ears are a normal variant, most commonly seen in infants <6months.
However it's been seen in young children and adults.
It's also called as the 'Transitory Extraperitoneal Hernia of Bladder in Infants'.


These following CT Axial sections of an elderly male shows the herniation of UB into the right inguinal canal.