Jackstone Calculus

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Updated: Dec 31, 2025

A Uniaxial Compression Experiment with CO2-Bearing Coal Using a Visualized and Constant-Volume Gas-Solid Coupling Test System

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Carolina Carneiro¹, Miguel F Cunha², Jorge Brito¹

¹Radiology department of Centro Hospitalar Universitário do Algarve, Portimão, Portugal; ABC - Algarve Biomedical Center, Faro, Portugal.

|December 31, 2019

Abstract:

Jackstone calculus is a rare bladder stone with a unique appearance, presenting a stippled and spiculated contour. Correct diagnosis is important because it may have therapeutic implications, as this distinctive shape correlates with a specific mineral composition of calcium oxalate dihydrate, which tend to be easily fragmented by lithotripsy, allowing to attempt an endoscopic treatment instead of surgery in larger stones. We present the case of a 77-year-old male where a 2 cm bladder calculus was incidentally found on CT, with features that allowed to make straightforward the diagnosis of a jackstone calculus.

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