Medically reviewed by Robert Burakoff, MD Key Takeaways A urachal cyst is a sac of tissue and fluid between the bladder and the belly button, which can sometimes cause discomfort or symptoms if it ...

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 ...

A photo of a cyst nematode's head viewed through a high-power microscope shows its esophageal glands, which produce effectors it uses to infect host plants. The image was digitally edited to highlight ...