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Urogenital Imaging

Calculus, urethral

stone formation in the urethra, most often secondary to migration of a stone from the kidney or bladder. Rarely, a primary urethral calculus may form proximal to stricture or in association with a urethral diverticulum or urethrocoele (see diverticulum urethral and urethrocoele). Urethral stones may produce symptoms of bladder outlet obstruction, or result in recurrent urethritis and urinary tract infection. Stones in a urethral diverticulum may be relatively asymptomatic (Fig.1). At imaging, most urethral calculi are solitary, but can be multiple (Fig.2). Most are small, though giant urethral calculi have been reported. Voiding cystourethrography or retrograde urethrography can be used to confirm that a suspected stone is in the urethra, to determine the relationship of the stone to the urethral lumen, and to evaluate the urethra for underlying structural abnormality.

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Fig.1

a. Cystogram image showing a calcification projected over the position of the urethra. b. Voiding view confirms the calcification represents a stone in a urethral diverticulum (arrow).
Calculus, urethral, Fig.1 (a)
Calculus, urethral, Fig.1 (b)
Calculus, urethral, Fig.2 (a)
Calculus, urethral, Fig.2 (b)
Calculus, urethral, Fig.2 (c)