An uncommon congenital fourth branchial cleft cyst presents after exercise as a painless, mobile posterior neck mass, ...

Medically reviewed by Robert Burakoff, MD Key Takeaways Liver cysts are usually harmless and don't cause symptoms. Most liver cysts don't need treatment unless they get large and cause issues, like ...

Hepatic cysts or liver cysts are filled with fluid, and they are present on the liver.