Bladder Stone 1

hage_23a_n.jpg and hage_23b_n.jpg: Plain pelvic x-ray and operative finding in a 3.2-year-old boy with bladder voiding disorder and erythrocytes in the urine sediment. hage_23a_n.jpg: Plain pelvic x-ray which shows an oval calcification with projection to the bladder region. hage_23b_n.jpg: The calculus removed by cystotomy measures 4.5 by 3.5 cm, is brick-red, and has a serrated surface. hage_23a_n.jpg and hage_23b_n.jpg: The diagnosis is a cystine stone as an example of a metabolic calculus. Cystine stones of the kidney and upper urinary tract are only faintly visible on plain x-ray, and become recognizable within the bladder due to the juxtaposition of calcium containing compounds. The site of the stone close to the bladder outlet explains the voiding disorder which stands in the foreground, and the serrated surface the erythrocytes in the urine sediment or the hematuria.