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Jackstone calculus
Type of urinary tract stone From Wikipedia, the free encyclopedia
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Jackstone calculus is a type of urinary tract stone characterized by its unique appearance with stippled and spiculated contour, resembling a toy jack.[1][2] Jackstone calculi are composed of calcium oxalate dihydrate, which gives them their irregular shape.[3] They are often detected in radiological investigations or cystoscopy.[4]

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