Urinary bladder stone
History of gross hematuria and pelvic pain.
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A large spiculated calcification is seen in the bladder on this unenhanced CT scan. The patient had no renal stones or other know GU pathology. A few smaller stones are present as well.
Bladder stones are more commonly seen in males than females. Bladder outlet obstruction or foreign body are common causes. Other causes are infection and spinal cord injuries. Bladder calculi may be small or large and may occur as single or multiple stones.