An impressive giant ovarian cystadenoma!That's a type of benign ovarian epithelial tumor at the benign end of the spectrum of ovarian serous tumors.It tends to be huge in size, often reaching to a size of a football and very often found incidentally with the patient complaining about abdominal fullness and pain. These cysts are filled with watery fluid, which essentially means that if not operated on time, they might rupture or burst open inside the abdominal cavity and present with symptoms mimicking acute abdomen.