Keyhole sign

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[edit] Discussion of Keyhole sign

  • Sonographic identification of hydronephrosis in a male fetus or infant should prompt investigation for the presence of posterior urethral valves.
  • The thick-walled bladder and dilated posterior urethra related to obstruction by the valves, as seen at US, may resemble a keyhole.

[edit] Images

Patient #1

[edit] See Also

[edit] External Links

[edit] References for Keyhole sign