Pear-shaped bladder caused by large iliopsoas muscles

Area of Science:

• Urology
• Radiology
• Anatomy

Background:

• Pelvic lipomatosis is a rare condition characterized by excessive fat deposition in the pelvic retroperitoneum.
• It can cause bladder outlet obstruction and urinary symptoms.
• Imaging is crucial for diagnosis, often revealing a characteristic pear-shaped bladder.

Observation:

• A case presented with a pear-shaped bladder on imaging.
• The appearance mimicked that of pelvic lipomatosis.
• Further investigation revealed the cause to be significantly enlarged iliacus and psoas muscles.

Findings:

• The pear-shaped bladder was attributed to extrinsic compression by hypertrophied iliacus and psoas muscles.
• This muscular hypertrophy was the primary finding, not fat deposition.
• This represents an unusual cause of bladder shape distortion.

Implications:

• Highlights the importance of considering muscular causes for bladder deformities.
• Broadens the differential diagnosis for pear-shaped bladder beyond pelvic lipomatosis.
• Emphasizes the role of detailed anatomical assessment in radiological interpretation.