A cyst is a sac that develops with fluid or air, or any other substance. It can form on any other part of the body. Cysts are usually noncancerous, and in some cases, cancer can cause cysts. Cysts are formed due to blockage of the duct due to trauma or infection, or inheritance. It can be treated with medications and surgical removal.
Megacystis in Pregnancy - A Walkthrough
An unusually large urinary bladder in the fetus is termed mega cystitis. Read to know more.