Q64.1: Exstrophy of urinary bladder

Due to a defect, the bladder is lying open in the abdominal wall.

The bladder sits low down in the abdomen and collects the urine. The urine is produced in the two kidneys. The urine flows from the kidneys into the bladder via the ureters. When you pass water, the urine flows from the bladder via the urethra and out. While developing in the womb, many different types of tissue develop in the body. The organs and body parts develop out of the various types of tissue. If the tissue does not develop properly in the womb, defects can result.

If the front part of the bladder fails to develop, the bladder does not become a spherical cavity. Instead, it forms a flat disc. Moreover, the skin and the layers of muscle in the abdominal wall do not develop properly at the affected site. As a result, the bladder lies uncovered in the abdominal wall. With this defect, the front connection of the two pelvic bones may also be missing. At the front, the pelvic bones are usually attached firmly to one another by ligaments and threads of cartilage. There may also be further defects in the area of the genital organs or urinary organs.

Urine can drain from the open bladder. It can be easier for pathogens to get into the urinary tract via the open bladder.

Additional indicator

On medical documents, the ICD code is often appended by letters that indicate the diagnostic certainty or the affected side of the body.

  • G: Confirmed diagnosis
  • V: Tentative diagnosis
  • Z: Condition after
  • A: Excluded diagnosis
  • L: Left
  • R: Right
  • B: Both sides

Further information


This information is not intended for self-diagnosis and does not replace professional medical advice from a doctor. If you find an ICD code on a personal medical document, please also note the additional indicator used for diagnostic confidence.
Your doctor will assist you with any health-related questions and explain the ICD diagnosis code to you in a direct consultation if necessary.


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