Beckwith-Wiedemann syndrome Hypoglossal nerve injury ... - MDC

Shock-Wave Lithotripsy for Renal Calculi
A 42-year-old man without a history of kidney stones had intermittent left flank pain for several
weeks before being seen by his primary care doctor. Urinalysis revealed microhematuria.
Computed tomography (CT) of the abdomen and pelvis without contrast enhancement identified
a calcification 12 mm in diameter in the left renal pelvis, associated with mild hydronephrosis and
a normal-caliber ureter. The attenuation coefficient of the stone was 790 Hounsfield units, and the
skin-to-stone distance was 8.5 cm. He was referred to a urologist, who reviewed the CT scan and
recommended treatment with extracorporeal shock-wave lithotripsy.
Nephrolithiasis is a common condition, with a lifetime prevalence of approximately 13% in men
and 7% in women in the United States. Total health care expenditures reached nearly $4.5 billion
annually, and this figure increased to $5.3 billion when the indirect costs of lost workdays were
included.