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Related to pear-shaped bladder: apple core sign
a urinary bladder with widening of the inferior section, seen in conditions such as pelvic lipomatosis, perivesical hematoma or urinoma, and lymphoma or lymphocyst.
Aetiology Trauma, pelvic lipomatosis, inferior vena cava occlusion, psoas muscle hypertrophy, rarely, pelvic lymphadenopathy
Diagnosis Ultrasonography, CT, MRI
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