Urachal residual disease(Nyomaku Kanizansho)What is it?

During fetal development, the bladder and navel are connected by a tube called the urachus. Normally, the baby is born with this lumen closed. However, if the lumen remains, this is called a persistent urachus. The urachus often remains near the navel.

What are the symptoms?

The hollow urachal remnant becomes infected, causing the navel to become red, swollen, and oozing. Pus may also come out of the navel.

These symptoms often occur repeatedly.

What about testing?

First, an ultrasound scan is performed. However, if the inflammation is severe, it may be difficult to determine the extent of the urachal remnant. In some cases, a CT scan may also be performed.