pear-shaped bladder

A descriptive term for a distended urinary bladder that is lifted out of the pelvis by an array of extravesical processes—e.g., haematoma, abscess, urinoma, hypertrophy of the iliopsoas muscle, lymphoma, tumour, fibrosis, bilateral iliac aneurysms, occlusion of the vena cava and pelvic lipomatosis; the external pressure narrows the bladder neck into an attenuated ‘stem,’ while a broad base at the bladder’s apex imparts a piriform configuration by excretory urography
Aetiology Trauma, pelvic lipomatosis, inferior vena cava occlusion, psoas muscle hypertrophy, rarely, pelvic lymphadenopathy
Diagnosis Ultrasonography, CT, MRI

pear-shaped bladder

The shape assumed by the urinary bladder when it undergoes extrinsic compression due to excess tissue in the pelvis. It causes include pelvic lipomatosis, pelvic hematoma, pelvic lymphadenopathy, extravasated urine, pelvic fluid collections, pelvic masses, bilateral iliac artery aneurysms, collateral vessels, and iliopsoas muscle hypertrophy .

See also: bladder