case_images: PMC8496350_01
case_images: Keyhole sign on prenatal ultrasonography.
case_images: fped-09-729932-g0001.jpg
case_images: PMC8496350_01_fped-09-729932-g0001.jpg
case_images: F1
case_images: Prenatal ultrasound at 26 weeks showed dilated bilateral upper urinary tracts, thick-walled distended bladder with a "keyhole sign," and dilated posterior and anterior urethra (see Figure 1).
case_images: PMC8496350_02
case_images: PMC8496350_03