Jackstone Calculus of the Urinary Bladder: Classic Imaging Features

Jackstone calculi are spiculated bladder stones with a toy-jack appearance on imaging. This Eurorad teaching case highlights their distinctive shape and formation in stagnant urine, aiding recognition on radiography and CT.

• Teaching case from the European Society of Radiology (Eurorad) showing a jackstone calculus in the urinary bladder.
• Key feature: spiculated, star-shaped stone resembling a children's toy jack; usually associated with urinary stasis or infection.
• Limitation: single illustrative case; not a systematic study of prevalence or outcomes.

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